Class 12 computer practical,CBSE class 12 computer practical

1. /* Write a program to find out the two digit numbers in an array? */
#include<iostream.h>
#include<conio.h>
void twodigit(int a[10][10],int m,int n)
{
int i,j,flag=0;
cout<<"The Two digit Numbers are: ";
for(i=0;i<m;i++)
for(j=0;j<n;j++)
{
if(a[i][j]>=10&&a[i][j]<=99)
{
cout<<a[i][j]<<ends;
flag=1;
}
}
if(flag==0)
cout<<"None";
}
void main()
{
clrscr();
int a[10][10],i,j,m,n;
cout<<"n EnterNo. of rows: ";
cin>>m;
cout<<"nEnter the no. of columns: ";

2. cin>>n;
cout<<"nEnter the Elements of the array: ";
for(i=0;i<m;i++)
for(j=0;j<n;j++)
cin>>a[i][j];
twodigit(a,m,n);
getch();
}
/***********************OUTPUT***********************************
EnterNo. of rows: 2
Enter the no. of columns: 2
Enter the Elements of the array: 1 2 3
4 5 6
The Two digit Numbers are: None
**************************************** */

3. /* WAP to find the stream of engineering a student goes (Using OOP). According to following guidelines:
marks>=96 computer sc
marks>=91&marks<=95 Electronics
marks>=86&marks<=90 Mechanical
marks>=81&marks<=85 Electrical
marks>=76&marks<=80 Chemical
marks>=71&marks<=75 Civil
marks<70 none */
#include<fstream.h>
#include<stdio.h>
#include<conio.h>
#include<process.h>
class student
{
char name[30];
int rollno;
int marks;
public:
void input()
{
cout<<"nEnter Name: ";
gets(name);
cout<<"Enter Rollno.: ";
cin>>rollno;
cout<<"enter marks";
cin>>marks;

4. }
void display()
{
cout<<"n"<<name<<"t"<<rollno<<"t"<<marks<<"t";
if(marks>=96)
cout<<"computer sc.";
else if(marks>=91&&marks<=95)
cout<<"Electronics";
else if(marks>=86&&marks<=90)
cout<<"Mechanical";
else if(marks>=81&&marks<=85)
cout<<"Electrical";
else if(marks>=76&&marks<=80)
cout<<"Chemical";
else if(marks>=71&&marks<=75)
cout<<"Civil";
else
cout<<"none";
}
};
void main()
{
clrscr();
student s;
int n,i,j;

5. fstream ofile,afile;
char ch,ch1;
do
{
cout<<"nt1.Add recordsnt2.Show Recordsnt3.Exit";
cin>>ch;
switch(ch)
{
case '1' :
ofile.open("st.dat",ios::app|ios::binary);
cout<<"nEnter no. of records to be Entered: ";
cin>>n;
for(i=0;i<n;i++)
{
s.input();
ofile.write((char*)&s,sizeof(student));
}
ofile.close();
break;
case '2' : cout<<"nNametRollnotMarkstStream";
afile.open("st.dat",ios::in);
while(afile)
{
afile.read((char *)&s,sizeof(student));
if (!afile)

6. break;
s.display();
}
afile.close();
break;
case '3' : exit(0);
}
cout<<"nt DO U want to continue ";
cin>>ch1;
}while(ch1=='Y');
getch();
}
/********************** OUTPUT *********************************
1.Add records
2.Show Records
3.Exit
2
Name Rollno Marks Stream
Ayshkant 5 90 Mechanical
Shuvam 6 70 none
Bhabesh 1 78 Chemical
DO U want to continue n
*********************************************** */

7. /* WAP to enter and display the following details of employee in tabular form (in class)
Employee No.
Employee Name
Salary */
#include<iostream.h>
#include<conio.h>
#include<stdio.h>
#include<process.h>
#include<iomanip.h>
class employee
{
int eno;
char name[30];
float salary;
public :
void input()
{
cout << "Enter Employee Number ";
cin >>eno;
cout << "Enter name ";
gets(name);
cout << "Enter salary ";
cin >>salary;
}
void show()
{
cout << eno << setw(20)<<name<<setw(20)<<salary<<endl;

8. }
float rt_sal()
{
return salary;
}
}emp[10];
main()
{
int n,ch,i,j;
char choice;
do
{
clrscr();
cout << "1. For enter "<<endl;
cout << "2. For tabular report"<<endl;
cout << "3. For exit";
cin >> ch;
switch(ch)
{
case 1: cout << "Enter how many employees ";
cin >>n;
for(i=0;i<n;i++)
{
emp[i].input();
}
break;

9. case 2:
employee temp;
for (i=0;i<n;i++)
{
for(j=i;j<n-1;j++)
{
if (emp[j].rt_sal()>emp[j+1].rt_sal())
{
temp = emp[j];
emp[j]=emp[j+1];
emp[j+1]=temp;
}
}
}
gotoxy(6,6);
cout <<"Employee Number ";
gotoxy(26,6);
cout <<"Name";
gotoxy(46,6);
cout <<"Salary"<<endl;
int r = 8;
for(i=0;i<n;i++)
{ emp[i].show();
r++;
}
break;
case 3: exit(0);

10. }
cout << "n Do U want to continue";
cin>>choice;
}while(choice == 'Y' ||choice =='y');
}
/******************************** OUTPUT *******************************
1. For enter
2. For tabular report
3. For exit
2
Employee Number Name Salary
1 Dan 700
2 Nick 900
Do U want to continue n
*************************************************************** */

11. /* WAP to find the no. of words, vowels, numbers in a given text? */
#include<fstream.h>
#include<stdio.h>
#include<conio.h>
#include<ctype.h>
#include<process.h>
void main()
{
clrscr();
int n,j;
fstream ofile,afile;
char str[100];
char ch,ch1;
do
{
cout<<"nt1.Create Textnt2.Count vowels/words/digitsnt3.Show Textnt4.Exit";
cin>>ch;
switch(ch)
{
case '1' :
ofile.open("smp.txt",ios::out);
cout<<"n Enter The Text ";
gets(str);
ofile<<str;
ofile.close();
break;

12. case '2' :
char tmp1;
int v=0,d=0,w=0;
afile.open("smp.txt",ios::in);
while(!afile.eof())
{
afile.get(tmp1);
if(tmp1=='a'||tmp1=='e'||tmp1=='i'||tmp1=='o'||tmp1=='u')
v++;
if(isdigit(tmp1))
d++;
if(tmp1==' '||tmp1=='.')
w++;
}
afile.close();
cout<<"n No of Vowels: "<<v;
cout<<"n No of digits: "<<d+1;
cout<<"n No of words: "<<w;
break;
case '3' :
char tmp2;
afile.open("smp.txt",ios::in);
ofile.open("spl.txt",ios::out);
while(!afile.eof())
{

13. afile.get(tmp2);
if(tmp2==' ')
{
ofile<<'#';
}
else
{
ofile<<tmp2;
}
}
afile.close();
ofile.close();
cout<<"nFormatted text:t";
afile.open("spl.txt",ios::in);
while(afile)
{
afile.get(ch);
cout<<ch;
}
afile.close();
break;
case '4' : exit(0);
}
cout<<"nt DO U want to continue ";
cin>>ch1;
}while(ch1=='Y'||ch1=='y');

14. getch();
}
/********************* OUTPUT ************************************
1.Create Text
2.Count vowels/words/digits /*
3.Show Text
4.Exit
1
Enter The Text india
DO U want to continue y
1.Create Text
2.Count vowels/words/digits
3.Show Text
4.Exit
2
No of Vowels: 3
No of digits: 1
No of words: 0
DO U want to continue y
1.Create Text
2.Count vowels/words/digits
3.Show Text
4.Exit
3
Formatted text: indiaÿÿ
DO U want to continue n
******************************************************** */

15. /* WAP to create a text and find the upper case and lower case constants and vowels? */
#include<fstream.h>
#include<stdio.h>
#include<conio.h>
#include<ctype.h>
#include<process.h>
void main()
{
clrscr();
int n,j;
fstream ofile,afile;
char str[100];
char ch,ch1;
do
{
cout<<"nt1.Create Textnt2.Read from Filent3.create another file";
cout << "n 4.Exit ";
cin>>ch;
switch(ch)
{
case '1' :
ofile.open("smp.txt",ios::out);
cout<<"n Enter The Text ";
gets(str);
ofile<<str;
ofile.close();
break;

16. case '2' :
char tmp1;
afile.open("smp.txt",ios::in);
while(!afile.eof())
{
afile.get(tmp1);
if(isalpha(tmp1))
{
if (islower(tmp1))
{
if (tmp1=='a'||tmp1=='e'||tmp1=='i'||tmp1=='o'||tmp1=='u')
cout << "n Lower case vowel "<<tmp1;
else
cout<<"n Lower case consonants "<<tmp1;
}
if (isupper(tmp1))
{
if (tmp1=='A'||tmp1=='E'||tmp1=='I'||tmp1=='O'||tmp1=='U')
cout << "n Upper case vowel "<<tmp1;
else
cout<<"n Lower case consonants "<<tmp1;
}
}
}
afile.close();
break;

17. case '3' : ofile.open("smp.txt",ios::in);
afile.open("smp1.txt",ios::out);
char c;
while(ofile)
{
ofile.get(c);
c = tolower(c);
if (c=='a'||c=='i'||c=='e'||c=='o'||c=='u')
afile.put(c);
}
ofile.close();
afile.close();
case '4' : exit(0);
}
cout<<"nt DO U want to continue ";
cin>>ch1;
}while(ch1=='Y'||ch1=='y');
getch();
}
/******************* OUTPUT **************************************
1.Creat Text
2.Read from file
3.creat another file
4.Exit
1

18. Enter The Text I am the King
DO U want to continue Y
1.Create Text
2.Read from File
3.create another file
4.Exit
2
Upper case vowel I
Lower case vowel a
Lower case consonants m
Lower case consonants t
Lower case consonants h
Lower case vowel e
Lower case consonants K
Lower case vowel i
Lower case consonants n
Lower case consonants g
DO U want to continue n
********************************************************** */

19. /* WAP to append record and search in a telephone directory? */
# include <fstream.h>
#include <conio.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
class telephone
{
char name[30];
char address[50];
double tno;
public :
void input()
{
cout<<"n Enter the name ";
gets(name);
cout << "n Enter address ";
gets(address);
cout<<"n Enter the telephone number ";
cin>>tno;
}
void show()
{
cout << "n Name "<<name;
cout << "n Address "<<address;
}
double rt_tno()

20. {
return tno;
}
}tele;
// Function to append the records in file
void append()
{
ofstream tfile;
telephone tele;
tfile.open("tele.dat", ios :: app);
int n,i;
cout<< "Enter how many customers ";
cin>>n;
for (i =0; i<n ;i++)
{
tele.input();
tfile.write((char *)& tele,sizeof(tele));
}
tfile.close();
}
// Function to search a record in the file
void display()
{
ifstream tfile;
tfile.open("tele.dat",ios :: binary);
int no,flag;

21. flag = 0;
cout<< "n Enter telephone number to be searched ";
cin>>no;
while(tfile)
{
tfile.read((char *)&tele , sizeof(tele));
if(!tfile)
break;
if (tele.rt_tno() == no)
{
tele.show();
flag = 1;
}
}
if (flag == 0)
cout<< "n Record does not exist ";
}
void main()
{
clrscr();
int ch;
cout << " 1. For append record ";
cout <<"n 2. For search ";
cout << "n 3. For exit";
cin >> ch;
switch (ch)
{

22. case 1: append();
break;
case 2: display();
break;
case 3 : exit(0);
}
}
/***************************OUTPUT***************************
1. For append record
2. For search
3. For exit
1
Enter how many customers 2
Enter the name Dan
Enter address KNAGAR
Enter the telephone number 223344
Enter the name mak
Enter address MNAGAR
Enter the telephone number 334455
Do Yoy want to cotinue y
1. For append record
2. For search
3. For Exit
2Enter the number to be searched 556677
Record does not exist
Do you want to continue n
********************************************************* */

23. /* WAP to record the blood donor’s name, address and blood group and search by the blood group when
required? */
#include<fstream.h>
#include<stdio.h>
#include<conio.h>
#include<process.h>
#include<string.h>
class donor
{
char name[30];
char address[30];
char bgroup[5];
public:
void input()
{
cout<<"nEnter Donor Name: ";
gets(name);
cout<<"Enter Address: ";
gets(address);
cout<<"Enter Blood Group: ";
gets(bgroup);
}
void display()
{
cout<<"nDonor Name: "<<name<<"tAddress: "<<address<<"tBlood Group: "<<bgroup<<"t";
}

24. char *getbgroup()
{
return bgroup;
}
};
void main()
{
clrscr();
donor d;
int n,i,j;
fstream ofile,afile;
char ch,ch1;
do
{
cout<<"nt1.Add recordsnt2.Search Recordsnt3.List Recordsnt4.Exit";
cin>>ch;
switch(ch)
{
case '1' :
ofile.open("dnr.dat",ios::out|ios::binary);
cout<<"nEnter no. of records to be Entered: ";
cin>>n;
for(i=0;i<n;i++)
{

25. d.input();
ofile.write((char*)&d,sizeof(donor));
}
ofile.close();
break;
case '2' : cout<<"nEnter Blood Group to be searched: ";
char bg[5],flag=0;
gets(bg);
afile.open("dnr.dat",ios::in);
while(afile)
{
afile.read((char *)&d,sizeof(donor));
if(!afile)
break;
if (strcmp(bg,d.getbgroup())==0)
{
d.display();
flag=1;
}
}
if(flag==0)
cout<<"n No record Found";
afile.close();
break;
case '3' :
afile.open("dnr.dat",ios::in);

26. while(afile)
{
afile.read((char *)&d,sizeof(donor));
if(!afile)
break;
d.display();
}
afile.close();
break;
case '4' : exit(0);
}
cout<<"nt DO U want to continue ";
cin>>ch1;
}while(ch1=='Y'||ch1=='y');
getch();
}
/**********************OUTPUT***************************************
1.Add records
2.Search Records
3.List Records
4.Exit
1
Enter no. of records to be Entered: 2

27. Enter Donor Name: Ayashkant
Enter Address: pl no. 820
Enter Blood Group: B+
Enter Donor Name: Swaraj
Enter Address: Pl. 98
Enter Blood Group: A+
DO U want to continue y
1.Add records
2.Search Records
3.List Records
4.Exit
2
Enter Blood Group to be searched: O+
No record Found
DO U want to continue
N
****************************************** */

28. /* WAP in C++ to record the book no., book name and price and search by its number when required (USING
CLASS)? */
#include<fstream.h>
#include<stdio.h>
#include<conio.h>
#include<process.h>
class book
{
char bname[30];
int bno;
float price;
public:
void input()
{
cout<<"nEnter Book Name: ";
gets(bname);
cout<<"Enter BOOK No.: ";
cin>>bno;
cout<<"Enter Price";
cin>>price;
}
void setprice()
{
cout<<"nEnter Price";
cin>>price;
}
void display()

29. {
cout<<"nBook Name: "<<bname<<"tBook No.: "<<bno<<"tPrice: "<<price<<"t";
}
int getbno()
{
return bno;
}
};
void main()
{
clrscr();
book b;
int n,i,j;
fstream ofile,afile;
char ch,ch1;
do{
cout<<"nt1.Add recordsnt2.Search Recordsnt3.Modify Recordsnt4.Exit";
cin>>ch;
switch(ch)
{
case '1' :
ofile.open("bk.dat",ios::out|ios::binary);
cout<<"nEnter no. of records to be Entered: ";
cin>>n;
for(i=0;i<n;i++)

30. {
b.input();
ofile.write((char*)&b,sizeof(book));
}
ofile.close();
break;
case '2' : cout<<"nEnter Book No. to be searched: ";
int bn,flag=0;
cin>>bn;
afile.open("bk.dat",ios::in);
while(afile)
{
afile.read((char *)&b,sizeof(book));
if(!afile)
break;
if (bn==b.getbno())
{
b.display();
flag=1;
break;
}
}
if(flag==0)
cout<<"n No record Found";
afile.close();
break;
case '3' :

31. cout<<"nEnter Book No. to be modified ";
int bn1,flag1=0,r=0;
cin>>bn1;
afile.open("bk.dat",ios::in|ios::out|ios::binary);
while(afile)
{
afile.read((char *)&b,sizeof(book));
if(!afile)
break;
if (bn1==b.getbno())
{
b.setprice();
afile.seekp(r*sizeof(b),ios::beg);
afile.write((char *)&b,sizeof(book));
flag1=1;
break;
}
r++;
}
if(flag1==0)
cout<<"n No record Found";
afile.close();
break;
case '4' : exit(0);
}
cout<<"nt DO U want to continue ";
cin>>ch1;

32. }while(ch1=='Y'||ch1=='y');
getch();
}
/****************************OUTPUT**********************
1.Add records
2.Search Records
3.Modify Records
4.Exit
1
Enter no. of records to be Entered: 2
Enter Book Name: The Wolf Of The Wallstreet
Enter BOOK No.: 34
Enter Price 50
Enter Book Name: The Oath Of The Vayuputra
Enter BOOK No.: 47
Enter Price 8
DO U want to continue y
1.Add records
2.Search Records
3.Modify Records
4.Exit
2
Enter Book No. to be searched: 34
Book Name: The Wolf Of The Wallstreet Book No.: 34 Price: 50
DO U want to continue n
****************************************************** */

33. /* WAP to record the student name, roll no. and fees and display its details when searched by roll no.? */
#include<fstream.h>
#include<stdio.h>
#include<conio.h>
#include<process.h>
class students
{
char sname[30];
int sno;
float fees;
public:
void input()
{
cout<<"nEnter Student Name: ";
gets(sname);
cout<<"Enter Roll No.: ";
cin>>sno;
cout<<"Enter Fees: ";
cin>>fees;
}
void display()
{
cout<<"nStudent Name: "<<sname<<"tRoll No.: "<<sno<<"tFees: "<<fees<<"t";
}
int getsno()
{
return sno;}

34. };
void main()
{
clrscr();
students s;
int n,i,j;
fstream ofile,afile;
char ch,ch1;
do
{
cout<<"nt1.Add recordsnt2.Search Recordsnt3.Delete Recordsnt4.Exit";
cin>>ch;
switch(ch)
{
case '1' :
ofile.open("std.dat",ios::out|ios::binary);
cout<<"nEnter no. of records to be Entered: ";
cin>>n;
for(i=0;i<n;i++)
{
s.input();
ofile.write((char*)&s,sizeof(students));
}
ofile.close();
break;
case '2' : cout<<"nEnter Roll No. to be searched: ";

35. int sn,flag=0;
cin>>sn;
afile.open("std.dat",ios::in);
while(afile)
{
afile.read((char *)&s,sizeof(students));
if(!afile)
break;
if (sn==s.getsno())
{
s.display();
flag=1;
break;
}
}
if(flag==0)
cout<<"n No record Found";
afile.close();
break;
case '3' :
cout<<"nEnter Roll No. to be Deleted ";
int sn1,flag1=0;
cin>>sn1;
afile.open("std.dat",ios::in|ios::binary);
ofile.open("tmpstd.dat",ios::out|ios::binary);
while(afile)
{

36. afile.read((char *)&s,sizeof(students));
if(!afile)
break;
if (sn1==s.getsno())
{
flag1=1;
}
else
{
ofile.write((char *)&s,sizeof(students));
}
}
if(flag1==0)
cout<<"n No record Found";
afile.close();
ofile.close();
afile.open("tmpstd.dat",ios::in|ios::binary);
ofile.open("std.dat",ios::out|ios::binary);
while(afile)
{
afile.read((char *)&s,sizeof(students));
ofile.write((char *)&s,sizeof(students));
}
afile.close();

37. ofile.close();
break;
case '4' : exit(0);
}
cout<<"nt DO U want to continue ";
cin>>ch1;
}while(ch1=='Y'||ch1=='y');
getch();
}
/************************OUTPUT*******************************
1.Add records
2.Search Records
3.Delet Records
4.Exit
1
Enter no. of records to be Entered: 2
Enter Student Name: Daniel
Enter Roll No.: 23
Enter Fees: 1200
Enter Student Name: Max

38. Enter Roll No.: 56
Enter Fees: 7890
DO U want to continue y
1.Add records
2.Search Records
3.Delete Records
4.Exit
2
Enter Roll No. to be searched: 23
Student Name: Daniel Roll No.: 23 Fees: 1200
DO U want to continue n
********************************************************* */

39. // This program illustrates the basic operation of add queue, delete queue and show queue
// using linked list.
#include <iostream.h>
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <ctype.h>
// Declares a queue structure
struct node
{
int Eno;
float Salary;
node *link;
};
// Functions prototype to add queue, delete queue, and show queue
node *add_Q(node *rear, int val,float val1); // Add queue
node *del_Q(node *front, int &val, float &val1);// Delete queue
void show_Q(node *front); // Show queue
// Main programming logic
void main()
{
node *front, *rear;
int val;
float val1;
int choice;
char opt = 'Y'; // To continue the do loop in case

40. front = rear = NULL; // Initialization of Queue
clrscr();
do
{
cout << "ntt Main Menu";
cout << "nt1. Addition of Queue";
cout << "nt2. Deletion from Queue";
cout << "nt3. Traverse of Queue";
cout << "nt4. Exit from Menu";
cout << "nnEnter Your choice from above ";
cin >> choice;
switch (choice)
{
case 1:
do
{
cout << "Enter the value to be added in the queue ";
cin >> val;
cin >> val1;
rear = add_Q(rear, val,val1);
if (front == NULL)
front = rear;
cout << "nDo you want to add more element
<Y/N>? ";
cin >> opt;
} while (toupper(opt) == 'Y');
break;

41. case 2:
opt = 'Y';// Initialize for the second loop
do
{
front = del_Q(front, val, val1);
if (front == NULL)
rear = front;
if (val != -1)
cout << "Value deleted from Queue is " <<
val;
cout << "nDo you want to delete more element
<Y/N>? ";
cin >> opt;
} while (toupper(opt) == 'Y');
break;
case 3:
show_Q(front);
break;
case 4:
exit(0);
}
}
while (choice != 4);
}
// Function body to add queue elements
node *add_Q(node *rear, int val, float val1)
{
node *temp;

42. temp = new node;
temp->Eno = val;
temp->Salary = val1;
temp->link = NULL;
rear->link = temp;
rear = temp;
return (rear);
}
// Function body to delete queue elements
node *del_Q(node *front, int &val, float &val1)
{
node *temp;
clrscr();
if (front == NULL)
{
cout << "Queue Empty ";
val = -1;
}
else
{
temp = front;
front = front->link;
val = temp->Eno;
val1 = temp->Salary;
temp->link = NULL;
delete temp;
}

43. return (front);
}
// Function body to show queue elements
void show_Q(node *front)
{
node *temp;
temp = front;
clrscr();
cout << "The Queue values are";
while (temp != NULL)
{
cout <<"nENO : "<< temp->Eno;
cout <<"nSalary : "<<temp->Salary;
temp = temp->link;
}
}
/******************************OUTPUT********************************
Main Menu
1. Addition of Queue
2. Deletion from Queue
3. Traverse of Queue
4. Exit from Menu
Enter Your choice from above 1
Enter the value to be added in the queue 234
567

44. Do you want to add more element <Y/N> n
Main Menu
1. Addition of Queue
2. Deletion from Queue
3. Traverse of Queue
4. Exit from Menu
Enter Your choice from above 2
The Queue values are
ENO : 234
Salary : 567
Main Menu
1. Addition of Queue
2. Deletion from Queue
3. Traverse of Queue
4. Exit from Menu
Enter Your choice from above 4
********************************************************************** */

45. /* WAP to add, delete and transverse stacks? */
#include <iostream.h>
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <ctype.h>
// Declares a stack structure
struct node
{
int roll;
int age;
node *link;
};
// Function prototype declaration for add stack, delete stack, and show stack
node *push(node *top, int val, int tage); // Add stack
node *pop(node *top); // Delete stack
void show_Stack(node *top); // Show stack
// Main programming logic
void main()
{
node *top;
int troll, tage, choice;
char opt = 'Y'; // To continue the do loop in case
top = NULL; // Initialization of Stack
clrscr();
do
{

46. cout << "ntt Main Menu";
cout << "nt1. Addition of Stack";
cout << "nt2. Deletion from Stack";
cout << "nt3. Traverse of Stack";
cout << "“nt4. Exit from Menu";
cout << "nnEnter your choice from above ";
cin >> choice;
switch (choice)
{
case 1:
do
{
cout << "Enter the roll no. : ";
cin >> troll;
cout << "Enter age : ";
cin >> tage;
top = push(top, troll, tage);
cout << "nDo you want to add more elements <Y/N> ? ";
cin >> opt;
} while (toupper(opt) == 'Y');
break;
case 2:
opt = 'Y'; // Initialize for the second loop
do
{
top = pop(top);
if (troll != -1)

47. cout << "Value deleted from Stack is " << troll;
cout << "nDo you want to delete more elements <Y/N> ? ";
cin >> opt;
} while (toupper(opt) == 'Y');
break;
case 3:
show_Stack(top);
break;
case 4:
exit(0);
}
}
while (choice != 4);
}
// Function body for adds stack elements
node *push(node *top, int val, int tage)
{
node *temp;
temp = new node;
temp->roll = val;
temp->age = tage;
temp->link = NULL;
if(top ==NULL)
top = temp;
else
{
temp->link = top;

48. top = temp;
}
return(top);
}
// Function body for delete stack elements
node *pop(node *top)
{
node *temp;
int tage, troll;
clrscr();
if (top == NULL )
{
cout << "Stack Empty ";
troll = -1;
}
else
{
temp = top;
top = top->link;
troll = temp->roll;
tage = temp->age;
temp->link = NULL;
cout << "ntPopped Roll Number is : " << temp->roll;
cout << "ntPopped Age is : " << temp->age;
delete temp;
}
return (top);

49. }
// Function body for show stack elements
void show_Stack(node *top)
{
node *temp;
temp = top;
clrscr();
cout << "The values are n";
while (temp != NULL)
{
cout << "n" << temp->roll << "t" << temp->age;
temp = temp->link;
}
}
/***********************OUTPUT***********************************
Main Menu
1. Addition of Stack
2. Deletion from Stack
3. Traverse of Stack“
4. Exit from Menu
Enter your choice from above 1
Enter the roll no. : 1
Enter age : 15
Do you want to add more elements <Y/N> ? y

50. Enter the roll no. : 2
Enter age : 17
Do you want to add more elements <Y/N> ? n
Main Menu
1. Addition of Stack
2. Deletion from Stack
3. Traverse of Stack
4. Exit from Menu
Enter your choice from above 3
The values are
2 17
1 15
Main Menu
1. Addition of Stack
2. Deletion from Stack
3. Traverse of Stack“
4. Exit from Menu
Enter your choice from above 4
*********************************************************** */

51. /*This program illustrates the basic operation of circular to add queue, delete queue and show queue using
array. The queue contains data of type character. */
#include <iostream.h>
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <ctype.h>
#define MAX 20 // Show maximum array length
char queue[MAX]; // Declares array global variable
int front, rear; // Declares integer front and read
// Function prototypes to add queue, delete queue and show queue in array implementation
void add_Q(char queue[], int front, char val, int &rear); // Add queue
char del_Q(char queue[], int &front, int rear); // Delete queue
void show_Q(char queue[], int front, int rear); // Show queue
void main()
{
int choice;
char val;
char opt = 'Y'; // To continue the do loop in case
rear = -1; // Initialization of Queue
ront = -1;
clrscr();
do
{
cout << "ntt Main Menu";
cout << "nt1. Addition of Queue";
cout << "nt2. Deletion from Queue";

52. cout << "nt3. Traverse of Queue";
cout << "nt4. Exit from Menu";
cout << "nnEnter Your choice from above ";
cin >> choice;
switch (choice)
{
case 1:
do
{
cout << "Enter the value to be added in the queue ";
cin >> val;
add_Q(queue, front, val, rear);
cout << "Do you want to add more element <Y/N>? ";
cin >> opt;
} while (toupper(opt) == 'Y');
break;
case 2:
opt = 'Y';// Initialize for the second loop
do
{
val = del_Q(queue, front, rear);
if (val != -1)
cout << "Value deleted from Queue is " << val;
cout << "nDo you want to delete more element <Y/N>? ";
cin >> opt;
} while (toupper(opt) == 'Y');
break;

53. case 3:
show_Q(queue, front, rear);
break;
case 4:
exit(0);
}
}
while (choice != 4);
}
// Function body to add circular queue with array of character
void add_Q(char queue[], int front, char val, int &rear)
{
if ((rear + 1) % MAX == front)
{
cout << "Queue Full ";
}
else
{
rear = (rear + 1) % MAX;
queue[rear] = val;
}
}
// Function body to delete circular queue with array of character
char del_Q(char queue[], int &front, int rear)
{
char value;
if (front == rear)

54. {
cout << "Queue Empty ";
value = -1;
}
else
{
front = (front + 1) % MAX;
value = queue[front];
}
return (value);
}
// Function body to show circular queue with array
void show_Q(char queue[], int front, int rear)
{
clrscr();
cout << "The values are ";
do
{
front = (front + 1) % MAX;
cout << "n" << queue[front];
}while(front != rear);
}
/***********************OUTPUT************************************************ Main Menu
1. Addition of Queue
2. Deletion from Queue
3. Traverse of Queue
4. Exit from Menu

55. Enter Your choice from above 1
Enter the value to be added in the queue 3
Do you want to add more element <Y/N>? n
Main Menu
1. Addition of Queue
2. Deletion from Queue
3. Traverse of Queue
4. Exit from Menu
Enter Your choice from above 4
**************************************************************************** */

56. /* Program to define the classes PERSON, GAME and STUDENT & to access the essential data using multiple
inheritance.*/
#include<iostream.h>
#include<stdio.h>
#include<conio.h>
class person{ char name[21];
int age;
public:
void indata()
{cout<<"nnEnter the name of Student: " ;
gets(name);
cout<<"nnEnter the age : ";
cin>>age;
}
void outdata();
};
void person::outdata() // since the function contains loop so it is not made inline
{
cout<<"nn";
for(int i=0; i<79; i++)
cout<<"-";
cout<<"nnName of the student is: "<<name;
cout<<"nnAge of the student is : "<<age;
}
class game {
char game_name[20];
public:
void input()
{
cout<<"nnEnter the game name : ";
cin.get();cin.getline(game_name,20);
}
void output()
{
cout<<"nnGame opted by the student is : "<<game_name;
}
};
class student: public person, public game
{ float Tmarks;
int rollno;
public:
char calgrade()
{if(Tmarks>90)
return 'A';
else if(Tmarks>80&&Tmarks<=90)
return 'B';

57. else if(Tmarks>70&&Tmarks<=80)
return 'C';
else if(Tmarks>60&&Tmarks<=70)
return 'D';
else
return 'E';
}
void enter()
{
indata(); // indata() of class person called here
cout<<"nnEnter the roll number: "; cin>>rollno;
input(); // input() of class game called here
cout<<"nnEnter total marks (out of 100) : ";
cin>>Tmarks;
}
void display()
{
outdata();
cout<<"nnRoll number : "<<rollno;
output();
cout<<"nnTotal marks are : "<<Tmarks;
cout<<"nnGrade = "<<calgrade();
}
};
void main()
{ clrscr();
student A;
A.enter();
A.display();
getch();
}
/**************************OUTPUT*********************************
Enter the name of Student: Ayashkant Mishta
Enter the age : 16
Enter the roll number: 01
Enter the game name : Kabbadi
Enter total marks (out of 100) : 95
--------------------------------------------------------------------------------------------------------------------------------------------------------
------------
Name of the student is: Ayashkant Mishra

58. Age of the student is : 16
Roll number : 34
Game opted by the student is : Kabbadi
Total marks are : 95
Grade = A
****************************************************************** */

59. /* Wap in c++ to implement stack as an array */
#include<iostream.h>
#include<conio.h>
#include<process.h>
int pop(int[],int&);
int push(int[],int&,int);
void display(int[],int);
const int size=50;
void main()
{
clrscr();
char m,ch;
int k,stack[size],item,top=-1,res;
do
{ cout<<"nChoose from the following : nn"
<<"n 1. Push"
<<"n 2. Pop"
<<"n 3. Display"
<<"n 4. Exit"
<<"nnEnter your choice : "; cin>>k;
switch(k)
{
case 1: ch='y';
while(ch=='y'||ch=='Y')
{ cout<<"nEnter the element : ";
cin>>item;
res=push(stack,top,item);
if(res==-1)
{cout<<"nOverflow !!!!";
exit(1); }

60. cout<<"nThe stack formed is : nn";
display(stack,top);
cout<<"nnnWant to enter again ?: ";
cin>>ch;
}
break;
case 2: ch='y';
while(ch=='y'||ch=='Y')
{ res=pop(stack,top);
if(res==-1)
{
cout<<"nUnderflow !!!!";
exit(1);
}
else
{
cout<<"nThe deleted Element is : "<<res<<endl;
cout<<"nThe resultant stack is : nn";
display(stack,top); }
cout<<"nWant to delete again ? : ";
cin>>ch;
}
break;
case 3: cout<<"nThe resultant stack is : ";
display(stack,top);
break;
case 4: exit(0);
break;
default: cout<<"nPlease enter desired keyword : ";
} // end of switch

61. cout<<"nnChoose from the menu again ? : ";
cin>>m;
}while(m=='y'||m=='Y'); // end of do-while loop
getch();
} // end of main()
int push(int stack[],int &top,int el)
{
if(top==size-1)
return -1;
else
{
top++;
stack[top]=el;
return 0;
}
}
int pop(int stack[],int &top)
{
int ret;
if(top==-1)
return -1;
else
{
ret=stack[top];
top--;
return ret;
}
}
void display(int stack[],int top)
{
cout<<stack[top]<<"<--";

62. for(int i=top-1;i>=0;i--)
cout<<stack[i]<<"<--";
}
/************************************OUTPUT********************************************
Choose from the following :
1. Push
2. Pop
3. Display
4. Exit
Enter your choice : 1
Enter the element : 1
The stack formed is :
1 
Want to enter again ?: y
Enter the element : 2
The stack formed is :
2  1 
Want to enter again ?: y
Enter the element : 3
The stack formed is :
3 2  1 
Want to enter again ?: y
Enter the element : 4
The stack formed is :
4  3  2  1 

63. Want to enter again ?: N
Choose from the menu again ? : y
Choose from the following :
1. Push
2. Pop
3. Display
4. Exit
Enter your choice : 2
The deleted Element is : 4
The resultant stack is :
3  2  1 
Want to delete again ? : y
The deleted Element is : 3
The resultant stack is :
2  1 
Want to delete again ? : n
Choose from the menu again ? : y
Choose from the following :
1. Push
2. Pop
3. Display
4. Exit
Enter your choice : 3
The resultant stack is :
2 1 
Choose from the menu again ? : n
********************************************************************************** */

64. /* Wap to implement stack as a linked list */
#include<iostream.h>
#include<conio.h>
#include<process.h>
struct node {
int roll;
node* next;
}*top,*save,*ptr,*newptr,*np;
node *create(int a)
{
ptr=new node;
ptr->roll=a;
ptr->next=NULL;
return ptr;
}
void push(node *np)
{
if(top==NULL)
top=np;
else
{
save=top;
top=np;
np->next=save;
}
}
void pop()
{
if(top==NULL)
cout<<"n Underflow!!!!";
else
{
ptr=top;
top=top->next;
delete ptr;
}
}
void display(node *np)
{
while(np!=NULL)
{
cout<<np->roll<<" -> ";
np=np->next;
}
}

65. void main()
{
clrscr();
top=NULL;
int n,m;
char k,ch;
do {
cout<<"nChoose from the menu :n"
<<"n 1. Push."
<<"n 2. Pop."
<<"n 3. Display."
<<"n 4. Quit."
<<"nnEnter your choice : ";
cin>>n;
switch(n)
{
case 1: k='y';
while(k=='y'||k=='Y')
{
cout<<"n Enter element to be inserted .";
cin>>m;
newptr=create(m);
if(newptr==NULL)
cout<<"n Cannot create !!!!";
push(newptr);
cout<<"n The Stack formed is : ";
display(top);
cout<<"nn Want to enter again ?: ";
cin>>k;
}
break;
case 2: k='y';
while(k=='y'||k=='Y')
{
pop();
cout<<"n The Stack formed is : nn";
display(top);
cout<<"nn Want to delete again ?: ";
cin>>k;
}
break;
case 3: cout<<"n The Stack formed is : ";

66. display(top);
break;
case 4: exit(0);
break;
default: cout<<"n Please enter desired keyword : ";
}
cout<<"n Do you want to continue..? : ";
cin>>ch;
}while(ch=='y'||ch=='Y');
getch();
}
/*********************************************OUTPUT*****************************************
*****
Choose from the menu :
1. Push.
2. Pop.
3. Display.
4. Quit.
Enter your choice : 1
Enter element to be inserted : 1
The Stack formed is :
1 ->
Want to enter again ?: y
Enter element to be inserted : 2
The Stack formed is :
2 -> 1 ->
Want to enter again ?: y
Enter element to be inserted : 3
The Stack formed is :

67. 3 -> 2 -> 1 ->
Want to enter again ?: n
Do you want to continue..? : y
Choose from the menu :
1. Push.
2. Pop.
3. Display.
4. Quit.
Enter your choice : 2
The Stack formed is :
2 -> 1 ->
Want to delete again ?: y
The Stack formed is :
1 ->
Want to delete again ?: N
Do you want to continue..? : y
Choose from the menu :
1. Push.
2. Pop.
3. Display.
4. Quit.
Enter your choice : 3
The Stack formed is :
1 ->
Do you want to continue..? : y
Choose from the menu :
1. Push.
2. Pop.
3. Display.
4. Quit.
Enter your choice : 4
*********************************************************************************** */

68. /* Wap in C++ to read file “sports.dat” and copy only those records where event name is ATHLETIC using the
concept of Data file handling. */
#include<fstream.h>
#include<string.h>
#include<conio.h>
#include<stdio.h>
#include<stdlib.h>
struct sports {
char event[20];
char participants[10][30];
int no_of_participants;
} s[20], s2[20];
void copy(fstream &ob);
int i=0;
void main()
{
clrscr();
char choice;
fstream ob("sports.dat",ios::binary|ios::in|ios::out);
do
{
if(i>0)
cin.get();
cout<<"nnEnter the name of Event : ";
cin.getline(s[i].event,20);
cout<<"nnEnter the total number of participants in Event "<<s[i].event<<" : ";
cin>>s[i].no_of_participants;
cout<<"nnEnter the name of Praticipants : n";
cin.get();
for(int j=0; j<s[i].no_of_participants; j++)
cin.getline(s[i].participants[j],30);
ob.write((char*)&s[i], sizeof(sports));
cout<<"nnnWant to Enter Details of Another Event (Y/N) : ";
cin>>choice;
i++;
} while(choice=='y'||choice=='Y');

69. cout<<"nnnnn******************************************************************************
******************************nn";
copy(ob);
cout<<"nn***********************************************************************************
******************************nnn";
getch();
}
void copy(fstream &o)
{
sports s[20];
o.seekg(0);
ofstream file;
file.open("athletic.dat",ios::binary);
file.seekp(0);
int j,n=0;
int c=0;
while(o)
{
o.read((char*)&s[c], sizeof(sports));
if(strcmp("athletic",s[c].event)==0)
{
file.write((char*)&s[c], sizeof(sports));
n=1;
break;
}
c++;
}
if(n==0)
{
cout<<"nnUnsuccessful Search.";
getch();
exit(0);
}o.close();

70. file.close();
sports sp;
ifstream oo;
oo.open("athletic.dat",ios::binary);
while(oo)
{
oo.read((char*)&sp, sizeof(sports));
}
cout<<"nnThe Records of file are : nn";
cout<<"nnEvent = "<<sp.event;
cout<<"nnnnThe Participants are : nn";
for(int i=0; i<sp.no_of_participants; i++)
{
cout<<sp.participants[i]<<"nn";
}
oo.close();
remove("athletic.dat");
remove("sports.dat");
}
/**************************************OUTPUT************************************************
**
Enter the name of Event : Cricket
Enter the total number of participants in Event Cricket : 3
Enter the name of Praticipants :
Rahul verma
Shivam
Siddharth
Want to Enter Details of Another Event (Y/N) : y

71. Enter the name of Event : athleltic
Enter the total number of participants in Event atlhletic : 2
Enter the name of Praticipants :
Mohak
Vikas
Want to Enter Details of Another Event (Y/N) : y
Enter the name of Event : Football
Enter the total number of participants in Event Football : 2
Enter the name of Praticipants :
Arsh
Ashu
Want to Enter Details of Another Event (Y/N) : n
*********************************************************************************************
************************************
The Records of file are :
Event = athletic
The Participants are :
Mohak
Vikas
*********************************************************************************************
************************************ */

72. /* Wap to print and find the sum of Fibonacci series using recursion. */
#include<iostream.h>
#include<conio.h>
int fibonacci(int n);
void main()
{
clrscr();
int n;
cout<<"nn Enter the number of terms upto which you want the sum of fibonnaci series : ";
cin>>n;
cout<<"nnThe fibonacci series generated is : nn";
cout<<"1 1 ";
int s=fibonacci(n);
cout<<"nnThe sum of fibonacci series for "<<n<<" terms = "<<s;
getch();
}
int first=1;
int second=1;
int third;
int i=2;
int sum=0;
int fibonacci(int n)
{ if(n==1)
sum=1;

73. else if(n==2)
sum=2;
// n = 1 2 3 4 5
else if(n>1 && i!=n) // num = 1 1 2 3 5
{
third=first+second;
cout<<third<<” “;
if(i==2)
sum+=first+second+third;
else
sum+=third;
first=second;
second=third;
++i;
fibonacci(n);
}
return sum;
}
/*****************************OUTPUT*******************************************
Enter the number of terms upto which you want the sum of fibonnaci series : 5
The fibonacci series generated is :
1 1 2 3 5
The sum of fibonacci series for 5 terms = 12
**************************************************************************************** */

74. /* Wap in C++ to print and find the sum of even /odd numbers using recursion.*/
#include<iostream.h>
#include<conio.h>
int sum_even(int );
int sum_odd(int );
int sum=0;
int num=0;
void main()
{ clrscr();
int n;
int s_e, s_o;
cout<<"nnEnter the number upto which you want the sum of even/odd numbers : ";
cin>>n;
cout<<"nn The list of integers is : nn";
for(int l=1; l<=n; l++)
cout<<l<<"n";
s_e=sum_even(n);
s_o=sum_odd(n);
cout<<"nnThe sum of even numbers upto "<<n<<" = "<<s_e;
cout<<"nnThe sum of odd numbers upto "<<n<<" = "<<s_o;
getch();
}
int sum_even(int n){
if(num%2==0)
sum=sum+num;
if(num!=n && num<n)
{
++num;
sum_even(n);
}
return sum;
}
int sum_2=0;
int num_2=0;

75. int sum_odd(int n)
{
if(num_2%2!=0)
sum_2=sum_2+num_2;
if(num_2!=n)
{
num_2++;
sum_odd(n);
}
return sum_2;
}
/*********************************OUTPUT**********************************************
Enter the number upto which you want the sum of even/odd numbers : 10
The list of integers is :
1
2
3
4
5
6
7
8
9
10
The sum of even numbers upto 10 = 30
The sum of odd numbers upto 10 = 25
**************************************************************************** */

76. /* WAP in c++ using pointers to find the smallest and the largest element in a dynamically created array?*/
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int *array, smallest, largest, n;
cout<<"nnEnter the number of elements : ";
cin>>n;
array=new[n];
cout<<"nnEnter the elements : nn";
for(int i=0; i<n; i++)
cin>>array[i];
i=0;
cout<<"nnThe array formed is : nn";
while(i!=n)
{
cout<<array[i]<<" ";
i++;
}
smallest=array[0];
for(i=0; i<n; i++)
{
if(array[i]<=smallest)
smallest=array[i];
}

77. largest=array[0];
for(i=0; i<n; i++)
{
if(array[i]>=largest)
largest=array[i];
}
cout<<"nnThe smallest element is : "<<smallest<<"nnThe largest element is : "<<largest;
getch();
}
/*********************************************OUTPUT*****************************************
*****************
Enter the number of elements : 5
Enter the elements :
1
9
2
8
6
The array formed is : 1 9 2 8 6
The smallest element is : 1
The largest element is : 9
************************************************************************************** */

78. /* Wap using pointers to swap two integers. */
#include<iostream.h>
#include<conio.h>
void swap_using_pointers(int *, int *);
void main()
{
clrscr();
int a,b;
cout<<"nnEnter first integer : "; cin>>a;
cout<<"nnEnter second integer : "; cin>>b;
swap_using_pointers(&a,&b);
cout<<"nnNow value of first integer = "<<a;
cout<<"nnNow value of second integer = "<<b;
getch();
}
void swap_using_pointers(int *a,int *b)
{
int temp;
temp=*a; *a=*b; *b=temp;
}
/*****************************************OUTPUT*********************************************
***
Enter first integer : 1
Enter second integer : 100
Now value of first integer = 100
Now value of second integer = 1
**************************************************************************** */

79. /* Wap using pointers to swap two integers. */
#include<iostream.h>
#include<conio.h>
void swap_using_pointers(int *, int *);
void main()
{
clrscr();
int a,b;
cout<<"nnEnter first integer : "; cin>>a;
cout<<"nnEnter second integer : "; cin>>b;
swap_using_pointers(&a,&b);
cout<<"nnNow value of first integer = "<<a;
cout<<"nnNow value of second integer = "<<b;
getch();
}
void swap_using_pointers(int *a,int *b)
{
int temp;
*a=*b; *b=temp; temp=*a;
}
/*****************************************OUTPUT*****************************
Enter first integer : 1
Enter second integer : 100
Now value of first integer = 100
Now value of second integer = 1
******************************************************************** */

80. /* WAP to create a text file(.txt) and display number of words, alphabets, vowels and consonants and number
of lowercase and uppercase letters using the concept of DATA FILE HANDLING? */
#include<fstream.h>
#include<string.h>
#include<ctype.h>
#include<conio.h>
void main()
{
clrscr();
char a[80];
int words=0, upper_letters=0, lower_letters=0, alpha=0, vowels=0,consonants=0;
ofstream string("str.txt");
cout<<"nnEnter the string : ";
cin.getline(a,79);
string<<"The string is : "<<a<<"nn";
for(int i=0; i<strlen(a); i++)
{
if(a[i]==' ')
while(a[i]==' ')
{
i++;
}
if(isalnum(a[i]))
{
while(a[i]!=' ')
{
i++;
}
words++;
}
}
string<<"nnThe number of words in string are : "<<words;
string<<"nnnAlphabets in string are : nn";
for(i=0; i<strlen(a); i++)
{
if(isalpha(a[i]))
{
alpha++;
string<<a[i]<<" ";
}
}
string<<"nnTotal number of alphabets in string => "<<alpha;
string<<"nnnUppercase letters in string are : nn";
for(i=0; i<strlen(a); i++)
{
if(isupper(a[i]))
{
upper_letters++;
string<<a[i]<<" ";

81. }
}
string<<"nnTotal number of uppercase letters in string => "<<upper_letters;
string<<"nnnLowercase letters in string are : nn";
for(i=0; i<strlen(a); i++)
{
if(islower(a[i]))
{
lower_letters++;
string<<a[i]<<" ";
}
}
string<<"nnTotal number of Lowercase letters in string => "<<lower_letters;
string<<"nnnVowels in string are : nn";
for(i=0; i<strlen(a); i++)
{
if(isalpha(a[i]))
{
if(a[i]=='a'||a[i]=='A'||a[i]=='e'||a[i]=='E'||a[i]=='i'||a[i]=='I'||a[i]=='o'||a[i]=='O'||a[i]=='u'||a[i]=='U')
{
vowels++;
string<<a[i]<<" ";
}
}
}
string<<"nnTotal number of vowels in string => "<<vowels;
string<<"nnnConsonants in string are : nn";
for(i=0; i<strlen(a); i++)
{
if(isalpha(a[i]))
{
if(a[i]!='a'&&a[i]!='A'&&(a[i]!='e'&&a[i]!='E'&&a[i]!='i'&&a[i]!='I'&&(a[i]!='o'&&a[i]!='O')&&a[i]!='u'&&a[i]!='U')
{
consonants++;
string<<a[i]<<" ";
}
}
}
string<<"nnTotal number of vowels in string => "<<consonants;
getch();
}
/*****************************OUTPUT*************************************
Enter the string : Ayashkant Misha
Output of created text file:
The string is : Atashkant Mishra

82. The number of words in string are : 2
Alphabets in string are :
A y a s h k a n t M i s h r a
Total number of alphabets in string => 10
Uppercase letters in string are :
A M
Total number of uppercase letters in string => 2
y a s h k a n t i s h r a
Lowercase letters in string are :
Total number of Lowercase letters in string => 13
Vowels in string are :
a i
Total number of vowels in string => 2
Consonants in string are :
y s h k n t r s h
Total number of vowels in string => 8
************************************************************************ */

83. /* WAP Using Multiple Inheritance For The Classes Student, Game And Person? */
#include<iostream.h>
#include<stdio.h>
#include<conio.h>
class person{ char name[21];
int age;
public:
void indata()
{cout<<"nnEnter the name of Student: " ;
gets(name);
cout<<"nnEnter the age : ";
cin>>age;
}
void outdata();
};
void person::outdata()
{
cout<<"nn";
for(int i=0; i<79; i++)
cout<<"-";
cout<<"nnName of the student is: "<<name;
cout<<"nnAge of the student is : "<<age;
}
class game {
char game_name[20];
public:
void input()
{
cout<<"nnEnter the game name : ";
cin.get();cin.getline(game_name,20);
}
void output()
{
cout<<"nnGame opted by the student is : "<<game_name;
}
};
class student: public person, public game
{ float Tmarks;
int rollno;
public:
char calgrade()
{if(Tmarks>90)
return 'A';
else if(Tmarks>80&&Tmarks<=90)
return 'B';
else if(Tmarks>70&&Tmarks<=80)
return 'C';
else if(Tmarks>60&&Tmarks<=70)

84. return 'D';
else
return 'E';
}
void enter()
{
indata();
cout<<"nnEnter the roll number: "; cin>>rollno;
input();
cout<<"nnEnter total marks (out of 100) : ";
cin>>Tmarks;
}
void display()
{
outdata();
cout<<"nnRoll number : "<<rollno;
output();
cout<<"nnTotal marks are : "<<Tmarks;
cout<<"nnGrade = "<<calgrade();
}
};
void main()
{ clrscr();
student A;
A.enter();
cout<<”nnstudent details are : nn”;
A.display();
getch();
}
/*********************************************OUTPUT*****************************************
**
Enter the name of student : Mahendra
Enter the age : 17
Enter the roll number: 21
Enter the game name : Cricket
Enter total marks (out of 100) : 99
Student Details are :

85. Name of the student is: Mahendra
Age of the student is : 17
Roll number : 21
Game opted by the student is : Cricket
Total marks are : 99
Grade = A
*********************************************************************************************
*********************** */