#include <stdio.h>

 void swap_value(int x,int y)

 {

     int temp;

     temp = x;

     x = y;

     y = temp;

     printf("传值函数内的输出 %d %d \n",x,y);

 }

 void swap_address(int *x,int *y)

 {

     int temp;

     temp = *x;

     *x = *y;

     *y=temp;

     printf("传址函数内的输出 %d %d \n",*x,*y);

 }

 int main(int argc, char *argv[])

 {

     int x = ;

     int y = ;

     printf("x y \n");

     printf("初值 %d %d \n",x,y);

     //传值子程序调用(交换xy)

     swap_value(x,y);

     printf("传值函数外调用 %d %d \n",x,y);

     //传地址字程序调用(交换x,y)

     swap_address(&x,&y);

     printf("传址函数外调用 %d %d \n",x,y);

     return ;

 }