POJ I Think I Need a Houseboat

I Think I Need a Houseboat

思路：距离问题，一道水题

代码：

#include <iostream>
#include <cmath>
using namespace std;
#define PI  3.1415
int main()
{
    int k, a = 1, year;
    double s, x, y;
    cin >> k;
    while (k--)
    {
        cin >> x >> y;
        s = (PI / 2)*(x*x + y*y);
        year = s / (double)50 + 1;
        cout << "Property " << a++ << ": This property will begin eroding in year " << year << "." << endl;
    }
    cout << "END OF OUTPUT." << endl;

    system("pause");
    return 0;
}