#include <stdio.h>
#include<stdlib.h>
void swap(int *pa, int *pb)
{
int tmp = *pa;
*pa = *pb;
*pb= tmp;
}
int main()
{
int n1 = 0;
int n2 = 0;
char *p1 = &n1;
char *p2 = &n2;
printf("请输入两个数：");
scanf_s("%d%d", &n1, &n2);
swap(p1,p2);
printf("n1=%d n2=%d\n", n1, n2);
system("pause");
return 0;
}运行结果：
请输入两个数：45 12
12 45
请按任意键继续. . .
使用函数实现两个数的交换
