კვადრატული განტოლება (C++)

quadratic.cpp

//
//  main.cpp
//  diskriminant
//
//  Created by GWSMaster on 08.10.14.
//  Copyright (c) 2014 GWSMaster. All rights reserved.
//

#include <iostream>
#include <cmath>
using namespace std;
int main(int argc, const char * argv[]) {
    // insert code here...
    double a,b,c,d,x1,x2;
    cout << "sheitanet a,b,c\n";
    cin >> a >> b >> c;
    d = b*b - 4*a*c;
    if ( d < 0 ) {
        cout << "\ngantolebas amonaxsni ar aqvs";
    } else if ( d == 0) {
        x1 = -b/(2*a);
        cout << "\namonaxsnebi:\n";
        cout << "\nx1 = x2 " << x1 << "\n";
    } else {
        x1 = (-b - sqrt(d)) / (2*a);
        x2 = (-b + sqrt(d)) / (2*a);
        cout << "\namonaxsnebi:\n"
                "x1 = " << x1 << "\t" << "x2 = " << x2 << "\n";
    }
    return 0;
}