题目一：
#include<stdio.h>
void temp(int x,int y){
int temp;
temp = x;
x = y;
y = tmp;
printf("temp函数打印：x=%d,y=%d
",x,y);
}
void main(void){
int a = 10 , b = 20;
tmpx(a,b);
printf("main函数打印：a=%d,b=%d
",a,b);
}
输出结果：
x = 20 , b = 10;
a = 10 , b = 20;
题目二：
#include<stdio.h>
void temp(int *x,int *y){
int temp = *x;
*x = *y;
*y = temp;
printf("temp函数打印：*x=%d,*y=%d
",*x,*y);
}
void main(void){
int a = 10,b = 20;
temp(&a,&b);
printf("main函数打印：a=%d,b=%d
",a,b);
}
输出结果：
*x = 20 , *b = 10;
a = 20 , b = 10;
题目三：
#include<stdio.h>
void temp(int &x,int &y){
int temp = x;
x = y;
y = temp;
printf("temp函数打印：x=%d,y=%d
",x,y);
}
void main(void){
int a = 10,b = 20;
temp(a,b);
printf("main函数打印：a=%d,b=%d
",a,b);
}
输出结果：
x = 20 , b = 10;
a = 20 , b = 10;