C PROGRAMS

C introduction programs

C Program to Print a Sentence

/* C Program to print a sentence. */

//************************************************

#include < stdio.h >

#include < conio.h >
void main()
{
                                  clrscr ( ) ;

               printf("C Programming");
               getch();
}

C Program to Print a Integer Entered by a User

/******************************************************/

//*****************************************************

#include < stdio.h >

#include < conio.h >

void main ( )

{

                           int num;

                            clrscr ( ) ;

                            printf ( "enter a number\n" );

                            scanf ( " %d ", &num);

                            printf ( " you entered %d ", num);

                           getch ( ) ;

}

c program to add two integers enterd by user

/***********************************************************/

//**********************************************************

#include < stdio.h >

#include < conio.h >

void main ( )

{

                          int a,b,sum;

                          clrscr( ) ;

                          printf ( "enter two numbers\n" );

                         scanf ( "%d%d",&a,&b);

                         sum=a+b ;

                         printf ( "sum : %d",sum);

                        getch ( ) ;

}

c program to multiply two floating point numbers

/****************************************************************************/

//**********************************************************************

#include < stdio.h >

#include < conio.h >

void main ()

{

     float  a , b ,product ;

     clrscr ( ) ;

     printf (" enter two numbers\n ");

     scanf (" %f %f ",&a,&b);

     product=a*b;

     printf (" product : % . 2f ",product);

     getch ( ) ;

}

c program to find ASCII value of a character

/* Source code to find ASCII value of a character entered by user */

//*****************************************************************
 #include < stdio.h >

 #include < conio.h >
 void main ( )
 {
    char c ;
    clrscr ( ) ;
    printf ( " Enter a character:  " ) ;
    scanf ( " % c ", &c ) ;       
    printf ( " ASCII value of  character is  = %d ",  c ) ;
    getch ();
 }

C Program to Find Quotient and Remainder of Two Integers Entered by User

/* C Program to compute remainder and quotient  */

# include < stdio.h >
# include < conio.h >
void main()
{
    int a, b, quotient, remainder ;
    clrscr ( ) ;
    printf ( " Enter a value \ n " ) ;
    scanf ( " %d ", &a) ;
    printf ( " Enter b value \ n " ) ;
    scanf ( " %d ", &b) ;
    quotient = a / b ;                                            /* Computes quotient */
    remainder = a % b ;                                      /* Computes remainder */
    printf ( " Quotient = %d \n ", quotient ) ;
    printf ( " Remainder = %d ", remainder ) ;
    getch ( ) ;
}

C Program to Find Size of int, float, double and char of Your System

/* This program computes the size of variable using sizeof operator.*/
//*********************************************************
#include    
#include   
void main()
{
    int a;
    float b;
    double c;
    char d;
    clrscr(); 
    printf("Size of int: %d bytes\n",sizeof(a));
    printf("Size of float: %d bytes\n",sizeof(b));
    printf("Size of double: %d bytes\n",sizeof(c));
    printf("Size of char: %d byte\n",sizeof(d));
    getch();
}

C Program to Demonstrate the Working of Keyword long

/**********************************************/
//*********************************************
#include 
#include 
void main()
{
    int a;
    long int b;                 /* int is optional. */
    long long int c;            /* int is optional. */
    clrscr();
    printf("Size of int = %d bytes\n",sizeof(a));
    printf("Size of long int = %ld bytes\n",sizeof(b));
    printf("Size of long long int = %ld bytes",sizeof(c));
    getch();
}

C Program to Swap Two Numbers

Using helping variable method

/************************************************/
//***********************************************
#include < stdio.h > 
#include < conio.h >
void main()
{
      float a, b, c;
      clrscr();
      printf("Enter value of a: \n");
      scanf("%f",&a);
      printf("Enter value of b: \n");
      scanf("%f",&b);
      c = a;        /* Value of a is stored in variable c */
      a = b;       /* Value of b is stored in variable a */
      b = c;    /* Value of c(which contains initial value of a) is stored in variable b*/
      printf("After swapping, value of a = %.2f\n", a);
      printf("After swapping, value of b = %.2f", b);
      getch();
}

With out using helping variable method

/************************************************/
//***********************************************
#include < stdio.h > 
#include < conio.h >
void main()
{
      float a, b ;
      clrscr();
      printf("Enter value of a: \n");
      scanf("%f",&a);
      printf("Enter value of b: \n");
      scanf("%f",&b);
      a = a + b ;
      b = a - b ;
      a = a - b ;
      printf("After swapping, value of a = %.2f\n", a);
      printf("After swapping, value of b = %.2f", b);
      getch();
}

Convert Fahrenheit to Celsius

/************************************************/
//***********************************************
#include < stdio.h > 
#include < conio.h >
void main()
{
      float f, c ;

       clrscr();

      printf("Enter Fahrenheit \n");

      scanf("%f",&f);

       c = ( f-32) * 5/9 ;

       printf(" celsius is % f ", c ) ;

       getch(); 

}