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那错了！！！！帮我看一下呀！大师兄！# include <iostream.h>
# include<math.h>
const double q=acos(-1);
int main()
{
int t,n;
float x,y;
double r;
cin>>t;
for(int i=1;i<=t;i++)
{
cin>>x>>y;
if(x!=0&&y>=0)
{
r=sqrt(x*x+y*y);
n=(int)(q*r*r/2)/50;
cout<<"Property"<<' ' <<i<<":This property will begin eroding in year "<<n+1<<endl;
}
}
cout<<"END OF OUTPUT"<<endl;
return 0;
}
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