#include <stdio.h>
void swap(int*a,int*b)
{
    int temp=*a;
    *a=*b;
    *b=temp;
}
int main()
{
    int a,b;
    printf("enter two integers:")
    scanf("%d %d",&a,&b);
    printf("before swapping:a=%d,b=%d\n",a,b);
    swap(&a,&b);
    printf("after swapping:a=%d,b=%d\n"a,b);
    return 0;
}