请问我的代码哪儿出错了啊？可以得出结果啦？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,year,d;
  int T;
 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;
}