从键盘上输入三个整数，按照从小到大的顺序输出。（用指针实现）

# include <stdio.h>

int main()
{
	int *p1,*p2,*p3,*p;
	int a,b,c;
	
	printf ("please enter three integer numbers:");
	scanf ("%d %d %d",&a,&b,&c);

	p1=&a;
	p2=&b;
	p3=&c;

	if(a>b)
	{
		p=p1;
		p1=p2;
		p2=p;
	}
	if(a>c)
	{
		p=p1;
		p1=p3;
		p3=p;
	}
	if(b>c)
	{
		p=p2;
		p2=p3;
		p3=p;
	}

	printf ("%d < %d < %d\n",*p1,*p2,*p3);
	return 0;
}