a006. 一元二次方程式

#include
#include
using namespace std;

int main()
{
    int a, b, c;
    while( cin >> a >> b >> c )
    {
  int sqrtOfThis=sqrt((double)(b*b-4*a*c));
  if( b*b - 4*a*c < 0 )
            cout << "No real root\n";
        else if( b*b - 4*a*c == 0 )
            cout << "Two same roots x=" << -b/(2*a) << endl;
        else
   cout << "Two different roots x1=" << (-b + sqrtOfThis ) / (2*a) 
     << " , x2=" << (-b - sqrtOfThis) / (2*a) << endl; 
    }
    return 0;
}