數學問題  我的想法是傑克在(1,0)輸出應該是99，屬於Happyyummy範圍

為何是hmm~~

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#include <iostream>
#include <math.h>
#include <cmath>

using namespace std;

int main(int argc, char** argv)
{
int yee,x,y;
double r,z;

while(cin >> x >> y)
{
r = x+y;

z = sqrt (r);

yee = 100 - z*z;



if(yee > 0 && yee<= 30)
{
cout << "sad!" <<endl;
}

else if(yee > 30 && yee<= 60)
{
cout << "hmm~~" <<endl;
}

else if(yee > 60 && yee< 100)
{
cout << "Happyyummy" <<endl;
}

else
{
cout << "evil!!" <<endl;
}

}
return 0;
}

如果 x < 0 , y < 0 

你的 sqrt 就 ..... 0u0

對誒....RRRRRRRR