[C语言]使用函数实现两个数的交换

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
void change(int *p, int*q){
 int tmp = 0;
 tmp = *p;
 *p = *q;
 *q = tmp;
}
int main(){
 int a;
 int b;
 printf("请输入a,b的值：\n");
 scanf("%d", &a);
 scanf("%d", &b);
 int *p = &a;
 int *q = &b;
 change(p, q);
 printf("交换后a=%d,b=%d", *p, *q);
 system("pause");
 return 0;
}