#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include<string.h>
void swap(int*pa, int*pb)
{
int z = 0;
z = *pa;
*pa = *pb;
*pb = z;
}
int main()
{
int a = 10;
int b = 20;
printf("交换前:a=%d b=%d\n", a, b);
swap(&a,&b);
printf("交换后:a=%d b=%d\n", a, b);
return 0;
}