Programming in C Presentation upto FILE

DIPTA SAHA
Diptasaha.lpu.cse@gmail.com

History Of
C is a middle level programming language.which is
developed by Dennis Ritchie while working at AT&T Bell
Labs in USA in between 1969 and 1973.

{
First C Program;
}
 1#include<stdio.h>
 2 int main()
 3 {
 4 printf("Hello C");
 5 return 0;
 6 }

{
Comments in C Program;
}
Single Line comment
/*…comments…..*/
Multi Line Comments
/*
Comments
*/

{
Local Variable in C;
}
A local variable is a variable that is declared inside a function.

{
Global Variable in C;
}
A Global variable is a variable that is declared Outsite a function.

{
Size of Data type in C;
}
int 2 -32768 to +32767
long 4 -2,147,483,648 to
2,147,483,647
Float 4 1.2E-38 to 3.4E+38
Double 8 2.3E-308 to 1.7E+308
Char 1 -128 to +127
Data Type Name Size(Byte) Range

{
Variable Declaration in C;
}
 Syntax
Datatype_name variable_name;
or
Datatype_name variable_name = values;
Example
Int a;
Or
Int a = 100;

{
Constant Variable Declaration in C;
}
 Syntax
Const Datatype_name variable_name = values;
Example
Const float pi = 3.1416;

{
Escape Sequence in C;
}
•n (newline)
•t (tab)
•v (vertical tab)
•f (new page)
•b (backspace)
•r (carriage return)
•n (newline)

{
get From User in C;
}
 Syntax
scanf("%d",&i);
Example
Int a;
Scanf(“%d”,&a);

{
Simple Program for get From User in C;
}

{
Operator in C;
}
C language is rich in built-in operators and provides the
following types of operators −
1. Arithmetic Operators
2. Relational Operators
3. Logical Operators
4. Bitwise Operators
5. Assignment Operator

{
Condition Operator in C;
}
Syntax:
(condition) ? True_res : false_res;
#include <stdio.h>
int main()
{
int x=1, y ;
y = ( x ==1 ? 2 : 0 ) ;
printf("x value is %dn", x);
printf("y value is %d", y);
}

{
Simple Program Using Operator in C;
}
 1 #include<stdio.h>
 2int main()
 3{
 4 int a=10,b=5;
 5 int add = a+b;
 6 int sub = a-b;
 7 int mul = a*b;
 8 int div = a/b;
 9 printf(“Add = %d”,add);
 10 printf(“Sub = %d”,sub);
 11 printf(“mul = %d”,mul);
 12. printf(“div = %d”,div);
 13return 0;
 14}

{
Conditional Execution in C;
}
In the c programming have some decision making Statement.
1. if statement
2. if...else statement
3. nested if statements
4.switch statement
5. nested switch statements

{
If Condition in C;
}
 Syntax
If(condition)
{
Statement..1;
Statement..2;
Statement..n;
}

{
Simple Program using If Condition in C;
}

{
if else Condition in C;
}
 Syntax
If(condition)
{
Statement;
}
Else
{
Statement;
}

{
Simple Program using If else Condition in C;
}

{
Nested if Condition in C;
}
 Syntax
If(condition)
{
Statement;
if(condition)
{
Statement;
}
}

{
Switch Statement in C;
}
 Syntax
Switch(expression)
{
Case constant_expression_1:
Statement 1;
Break;
Statement 2;
Break;
Statement 3;
Break;
Default:
Statement 4;
}

{
nested Switch Statement in C;
}  Syntax
Switch(expression-1)
{
Switch(expression-1)
{
case constant_expression :
statement;
break;
}
Break;
Statement 2;
Break;
Default:
Statement 3;
}

{
Types of Loops in C;
}
1. while loop
2. for loop
3. do...while loop
4. nested loops

{
while Loop in C;
}
Syntax
Initialization;
While(condition)
{
Statement..1;
Statement..2;
Statement..n;
increment/decrement;
}

{
A simple Program using While Loop in C;
}

{
for Loop in C;
}
Syntax
for(Initialization;condition; increment/decrement)
{
Statement..1;
Statement..2;
Statement..n;
}

{
A simple Program using For Loop in C;
}

{
do while Loop in C;
}
Syntax
Initialization;
do
{
Statement..1;
Statement..2;
Statement..n;
increment/decrement;
}
While(condition)

{
A simple Program using Do While Loop in C;
}

{
nested for Loop in C;
}
Syntax
{
Statement..1;
{
Statement..1;
Statement..2;
Statement..n;
}
}

{
Break Statement in C;
}
The break statement terminates the loop body immediately
and passes control to the next statement after the loop. Break
statement are mainly used with loop and switch statement.

{
A Simple Program Using Break Statement in C;
}

{
Continue Statement in C;
}
The continue statement in C programming works somewhat
like the breakstatement.

{
A Simple Program Using continue Statement in C;
}

{
Function in C;
} Syntax
Return_type function_name(argument)
{
statement;
return need_variable;
}
Example:
Int sum(int x,int y)
{
return x+y;
}

{
Function call in C;
}
Syntax:
Function_name(parameter or argument);
Example:
1 #include<stdio.h>
2 int main()
3 {
4 Int z=sum(10,20);
5 printf(z);
6 return 0;
7 }

{
Single Dimensional Array in C;
}
Syntax
data_type array_name [size];

{
Multi Dimensional Array in C;
}
Syntax
data_type array_name [row_size][column_size];

{
A simple program using 1D Array in C;
}

{
* Pointer in C;
}
A pointer is a variable whose value is the address of
another variable. Like any variable or constant, you must
declare a pointer before using it to store any variable
address.

{
Declaration of Pointer in C;
}
Syntax
data_type *var_name;
Example
int var = 20;
int *ip;
ip = &var;

{
A Simple Program Using Pointer in C;
}

{
File in C;
}
file is a place on your physical disk where information is stored.
Open a File
FILE *name;
name = fopen(“text.txt","a");
fclose(name);

{
File in C;
}
Write in a File
FILE *name;
name = fopen(“text.txt",“w");
If(name == NULL)
{
printf(“File Dose Not exist”);
}
else
{
for(i = 0; i < 10;i++){
fprintf (fp, "This is line %dn",i + 1);
}
fclose(name);
}

{
File in C;
}
Read in a File
FILE *name;
name = fopen(“text.txt",“w");
Char buff[200];
If(name == NULL)
{
printf(“File Dose Not exist”);
}
else
{
while(fscanf(fp, "%s", buff)!=EOF){
printf("%s ", buff );
}
fclose(name);
}

Programming in C Presentation upto FILE

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