200226

#include <stdio.h>

void swap(int *a, int *b)

{

int tmp;

tmp = *a;

*a=*b;

*b = tmp;

}

int main(){

int c = 10;

int d = 5;

printf("before c = %d d = %d\n",c,d);

swap(&c,&d);

printf("after c = %d d = %d\n",c,d);

return 0;

}