14-1005.cpp

www.acm.pku.edu.cn上的1005题

#include <iostream.h>
void main()
{
	const double PI=3.1415926;
	double x,y,num;
	int i,j,Answer[10];
	cin>>num;
	for ( i=0 ; i<num ; i++)
	{
		cin>>x>>y;
	for ( j=0 ; (j<50) && ( ((x*x+y*y)*PI*0.5)>(50.0*j) ) ; j++ );
    Answer[i]=j;
	}
	for ( i=0 ; i<num ; i++)
		cout<<"Property "<<(i+1)<<": This property will begin eroding in year "<<Answer[i]<<"."<<endl;
	cout<<"END OF OUTPUT.";


}