我的思路是PI/2*(Rn*Rn)-PI/2*(Rn-1*Rn-1)=50;然后迭代，Rn=sqrt(100/PI+Rn-1*Rn-1); 当Rn>d是就结束了。我的代码中now next分别代表Rn Rn-1
运行结果没错啊！我的很多同学不知道我的程序为什么错了！我大二。谢谢指点啊！

#include<iostream>
#include<cmath>
#define PI 3.1415926
using namespace std;

int main()
{
  float next,num=0,now,x,y,d;
  int T,year;
 next=now=0;
  cin>>T;
    
	do
	{
		++num;
		year=1;
        cin>>x>>y;
		d=sqrt(x*x+y*y);
		while(next<d)
		{
		  next=sqrt(100/PI+now*now);
		  if(next>d)
		    break;
		  else
			  ++year;
		  now=next;
		}	  
	   cout<<"Property "<<num<<": This property will begin eroding in year "<<year<<"."<<endl;
	}while(--T);

	cout<<"END OF OUTPUT."<<endl;
     
	return 0;
}

• Re:我的程序为什么是wrong answer 啊？恳请高手赐教啊！ (762) Jack2011 2011-06-29 00:46:37