The document contains 15 code snippets in C++ that demonstrate various programming concepts like input/output, loops, conditional statements, functions etc. Each snippet is followed by sample input/output. The snippets include programs to swap two numbers without third variable, find smallest of three numbers, calculate average of student ages, display patterns like triangles and stars, check divisibility etc.

1. Programming &ProblemSolving
1
/*Write a program that input two number interchange the value of and then display them
without using third variable.*/
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int a,b;
cout<<"Entr 1st num : ";
cin>>a;
cout<<"Entr 2nd num : ";
cin>>b;
cout<<"Value Befor Swapping:"<<endl;
cout<<"1st num="<<a<<endl;
cout<<"2nd num="<<b<<endl;
a=a+b;
b=a-b;
a=a-b;
cout<<"Value After Swapping:"<<endl;
cout<<"1st num="<<a<<endl;
cout<<"2nd num="<<b<<endl;
getch();
}
Out Put

2. Programming &ProblemSolving
2
/*Take input of Three n.o if the are not Equal,then find the Smallest n.o*/
#include<iostream.h>
#include<conio.h>
void main(){
clrscr();
int a,b,c;
cout<<"Entr 1st n.o = ";
cin>>a;
cout<<"Entr 2nd n.o = ";
cin>>b;
cout<<"Entr 3rd n.o = ";
cin>>c;
if((a<b)&&(a<c))
cout<<"Smallest n.o is = "<<a;
else if((c<a) && (c<b)){
cout<<"Smallest n.o is = "<<c;}
else if((b<a) && (b<c)){
cout<<"Smallest n.o is = "<<b;}
else{
cout<<"All n.o are Equal";}

3. Programming &ProblemSolving
3
getch();
}
Out Put
/*Take input of two n.o if 1st n.o is greater than 2nd,display the division
as follow i.e. 1st=16 2nd=5 Ans=5*3+1=16*/
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int n1,n2;
cout<<"Entr 1st no. = ";
cin>>n1;
cout<<"Entr 2nd no. = " ;
cin>>n2;
if(n2>n1)
{
cout<<"invalide input";
}
else
cout<<n2<<" * "<<n1/n2<<" + "<<n1%n2<<" = "<<n1<<"n";
getch();

4. Programming &ProblemSolving
4
}
Out Put
/*Show out
*****
*****
***** */
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int i,j;
for(i=1;i<=3;i++)
{
for(j=1;j<=5;j++)
{
cout<<"*";
}
cout<<"n";
}
getch();
}

5. Programming &ProblemSolving
5
Out Put
/*Take input a n.o and find if it is divisible by 10 or not*/
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int a;
cout<<"Entr any number = ";
cin>>a;
if(a%10==0)
{
cout<<"it is Divisible by 10";
}
else
{
cout<<"it is not Divisible by 10";
}
getch();

6. Programming &ProblemSolving
6
}
Out Put
/*entr 10 student age and show average age*/
#include <iostream.h>
#include<conio.h>
void main()
{
clrscr();
float age1,age2,age3,age4,age5,age6,age7,age8,age9,age10;
float TotalAge;
float AverageAge;
cout <<" Please Enter The Age Of Student 1:" ;
cin >> age1;
cout <<" Please Enter The Age Of Student 2:" ;
cin >> age2;
cout <<" Please Enter The Age Of Student 3:" ;
cin >> age3;
cout <<" Please Enter The Age Of Student 4:" ;
cin >> age4;
cout <<" Please Enter The Age Of Student 5:" ;
cin >> age5;
cout <<" Please Enter The Age Of Student 6:" ;

7. Programming &ProblemSolving
7
cin >> age6;
cout <<" Please Enter The Age Of Student 7:" ;
cin >> age7;
cout <<" Please Enter The Age Of Student 8:" ;
cin >> age8;
cout <<" Please Enter The Age Of Student 9:" ;
cin >> age9;
cout <<" Please Enter The Age Of Student 10:" ;
cin >> age10;
TotalAge=age1+age2+age3+age4+age5+age6+age7+age8+age9+age10;
AverageAge=TotalAge/10 ;
cout << " Average Age Of Class Is : " << AverageAge ;
getch();
}
Out Put
/*Show 1st 8 FIBONACCI Number */
#include<iostream.h>
#include<conio.h>
void main()

8. Programming &ProblemSolving
8
{
clrscr();
long int a=21,b=0,c=1,sum;
while(b<a)
{
cout<<c<<" ";
sum=b+c;
b=c;
c=sum;
}
getch();
}
Out Put
/* Show out
*
**
***
**** */
#include<iostream.h>
#include<conio.h>
void main()

9. Programming &ProblemSolving
9
{
clrscr();
int i,j,sp;
for(i=1;i<=4;i++){
for(sp=1;sp<=4-i;sp++)
{
cout<<" ";
}
for(j=1;j<=i;j++)
{
cout<<"*";}
cout<<"n";
}
getch();
}
Out Put
/*Triangle */
#include<iostream.h>
#include<conio.h>

10. Programming &ProblemSolving
10
void main() //if(i==1&&i==4&&j==1&&j==x)
{
clrscr();
int i,j,sp,x=1;
for(i=1;i<=4;i++,x=x+2)
{
for(sp=1;sp<=4-i;sp++) cout<<" ";
for(j=1;j<=x;j++)
{
if(i>1&&i<4&&j>1&&j<x)
cout<<" ";
else
cout<<"*";
}
cout<<"n";
}
getch();
}
Out Put

11. Programming &ProblemSolving
11
/*SUM OF 1ST 6TH PRIME NUMBER*/
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int i,j,sum=0,flag=1,x;
for(i=1,x=0;x<=5;i++)
{
for(j=2;j<=i/2;j++)
{
if(i%j==0)
{
flag=0;
break;
}
}
if(flag)
{
x++;
sum+=i;
cout<<i<<" + ";
}

12. Programming &ProblemSolving
12
else
{
flag=1;
}
}
cout<<"bb = "<<sum;
getch();}
Out Put
/*Enter The Amount Of The Bill And Discount At The Rate Of 10% */
#include <iostream.h>
#include<conio.h>
void main ()
{
clrscr();
double amount,discount,netpayable;
cout << " Please Enter The Amount Of The Bill ";
cin >> amount;
if(amount>5000)
{
discount = amount*(15.0/100);
netpayable = amount-discount;
cout <<" The Discount At The Rate Of 15 % is Rupees " << discount << endl;

13. Programming &ProblemSolving
13
cout << " The Payable Amount is Rupees " << netpayable;
}
else
{
discount = amount*(10.0/100);
netpayable = amount-discount;
cout <<" The Discount At The Rate Of 10 % is Rupees " << discount << endl;
cout << " The Payable Amount is Rupees " << netpayable;
}
getch();
}
Out Put
/*Show out
****
***
**
* */
#include<iostream.h>
#include<conio.h>
void main()
{

14. Programming &ProblemSolving
14
clrscr();
int i,j;
for(i=1;i<=4;i++)
{
for(j=i;j<=4;j++)
{
cout<<"*";
}
cout<<"n";
}
getch();
}
Out Put
/*Write a program that generates the following output using a single nested loop
$
##
$$$
#### */
#include<iostream.h>
#include<conio.h>

15. Programming &ProblemSolving
15
void main()
{
clrscr();
int i,j;
for(i=1;i<=4;i++)
{
for(j=1;j<=i;j++)
if(i%2==0)
cout<<"#";
else
cout<<"$";
cout<<"n";
}
getch();
}
Out Put