c08_02_2.c

it can help you know C++ souce program quckily

#include <stdio.h>

int main()
{
	int		a,b;					/*定义两个需交换的整型变量*/
	int		*temp, *p=&a, *q=&b;	/*定义一个交换用的中间指针变量temp*/
	
	printf("请输入两个需交换的数：a, b\n");
	scanf("%d,%d",p,q);
	printf("交换之前：a = %d  , b = %d\n", a, b); 
	temp = p;
	p = q;
	q = temp;
	printf("交换之后：a = %d  , b = %d\n", *p,*q);

	return 0;
}