#include <stdio.h>
#include <stdlib.h>
#include <time.h>
void swap(int* p1,int* p2);
int main() {
int a = 1;
int b = 2;
printf("%d,%d\n",a,b);
swap(&a,&b);
printf("%d,%d\n",a,b);
return 0;
}
void swap(int* p1,int* p2){
int temp = *p1;
*p1 = *p2;
*p2 = temp;
}