Source Code:
/*C program to swap two numbers using pointers.*/
#include<stdio.h>
// function : swap two numbers using pointers
void swap(int *a,int *b)
{
int t;
t = *a;
*a = *b;
*b = t;
}
int main()
{
int num1,num2;
printf(“Enter value of num1: “);
scanf(“%d”,&num1);
printf(“Enter value of num2: “);
scanf(“%d”,&num2);
//print values before swapping
printf(“Before Swapping: num1=%d,num2=%dn”,num1,num2);
//call function by passing addresses of num1 and num2
swap(&num1,&num2);
//print values after swapping
printf(“After Swapping: num1=%d, num2=%dn”,num1,num2);
return 0;
}