#include <stdio.h>
void swap(int*, int*);
int main()
{
int a, b;
a = 10;
b = 20;
printf("before swap() : a=%d, b=%d \n", a, b);
swap(&a, &b);
printf("after swap() : a=%d, b=%d \n", a, b);
return 0;
}
void swap(int *a, int *b){
int temp = *a;
*a = *b;
*b = temp;
printf("in swap() : a=%d, b=%d \n", a, b);
}