交换两个变量的值
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
//写一个无返回值的函数exchange
void exchange(int x, int y) {
int t; //定义中间变量t
t = x; //把x的值赋给t
x = y; //把y的值赋给x
y = t; //把t的值赋给y
}
int main() {
int i, j;
scanf("%d %d", &i, &j);
exchange(i, j); //调用exchange函数交换输入的i和j的值
printf("交换后为%d %d\n", j, i);
system("pause");
return 0;
}