C program to swap two numbers.

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

int a=0, b=0, temp=0;

clrscr();

printf(“Please input a number to store in a.\n”);

scanf(“%d”,&a);

printf(“Please input a number to store in b.\n”);

scanf(“%d”,&b);

printf(“Before swapping.\na=%d\nb=%d\n”, a,b);

/*displays the values of a and b before swapping.*/

/* swapping starts */

temp=a;

a=b;

b=temp;

/*swapping ends*/

printf(“After swapping.\na=%d\nb=%d\n”, a,b);

/*displays the values of a and b after swapping.*/

getch();

}

Example of output

Please input a number to store in a.

98

Please input a number to store in b.

34

Before swapping.

a=98

b=34

After swapping.

a=34

b=98