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帮看一下：我的precentatiao哪里有问题

Posted by hangsailor at 2006-10-16 20:13:44 on Problem 1005 
#include<iostream>

using namespace std;

void main()
{
 int a;
 cin>>a;
 cout<<endl;
 for(int i=1;i<=a;i++)
 {
	 float x,y;
	 cin>>x>>y;
     int year=int(3.1415926*(x*x+y*y)/100)+1;
	 cout<<"Property "<<i<<": This property will begin eroding in year "<<year<<".\n";
 }
 cout<<"END OF OUTPUT."<<endl;
}

我实在看不出来，新手……
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