#include<stdio.h>
void swap(int *a,int *b);
int main()

{
int a,b,temp;
printf("enter value of a");
scanf("%d", &a);

printf("enter value of b");
scanf("%d", &b);
swap(&a,&b);

printf("after swapping: a = %d, b = %d", a, b);
return 0;
} 

void swap(int *a,int *b){
int temp=*a;
*a=*b;
*b=temp;

}