编辑代码

#include <stdio.h>

void swap(int * x , int * y)
{
    int z = *x; //z = a
    *x = *y;    //x = b
    *y = z;     //y = z
}

int main()
{
    int a = 0;
    int b = 0;
    scanf("%d %d",&a, &b);
    printf("转换前a = %d，b = %d\n",a,b);
    swap(&a,&b);
    printf("转换前a = %d，b = %d\n",a,b);

    return 0;
}