方法一:使用函数实现两个数的交换
#include<stdio.h>
int fun(int *a,int *b)
{
int tmp;
tmp=*a;
*a=*b;
*b=tmp;
}
int main()
{
int x,y;
printf("please input two number:\n");
scanf("%d %d",&x,&y);
printf("x=%d,y=%d\n",x,y);
fun(&x,&y);
printf("x=%d,y=%d\n",x,y);
return 0;
}2.
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