frame polygonal line .txt

以前ACM在哈工程HRBEU做的一些简单题目

#include <iostream.h>
int main()
{
int x,y;
int max_x,max_y,min_x,min_y;
while(1)
{ 
bool flag=true;
while(1)
{
cin>>x>>y; 
if(x==0&&y==0)
break;
if(flag)
{
max_x=x,max_y=y,min_x=x,min_y=y; 
} 
else
{
if(x>max_x) 
max_x = x;
else if(x<=min_x) 
min_x = x;
if(y>max_y) 
max_y = y;
else if(y<=min_y)
min_y = y;
}
flag=false; 
}
if(flag)
break;
else
cout<<min_x<<" "<<min_y<<" "<<max_x<<" "<<max_y<<endl;
}
return 0;
}