Adamowe zagadki #2

#include <iostream>

using namespace std;

int main() {
    double a{}, b{}, c{}, x{};

    cout << "***********************" << endl;
    cout << "Podaj a =";
    cin >> a;
    cout << "Podaj b =";
    cin >> b;
    cout << "Podaj c =";
    cin >> c;
    cout << "***********************" << endl;
    cout << "Podaj x = ";
    cin >> x;
    cout << "***********************" << endl;

    if (a < 0) {
        if (a == -1)
            cout << "-x^2";
        else
            cout << a << "x^2";
    }
    else if (a > 0)
        if (a == 1)
            cout << "x^2";
        else
            cout << a << "x^2";
    if (b < 0) {
        if (b == -1)
            cout << "-x";
        else
            cout << b << "x";
    }
    else if (b > 0) {
        if(a==0)
            if(a==1)
                cout << "x";
            else
                cout << b << "x";
        else
            if(a==1)
                cout << "+" << "x";
            else
                cout << "+" << b << "x";
    }
    else;
    if (c < 0)
        cout << c;
    else if (c > 0) {
        if (b == 0 && a==0)
            cout << c;
        else
            cout << "+" << c;
    }
    else;
    cout << endl;

    double result{};
    result = a * x *x + b * x + c;
    cout << "***********************" << endl;
    cout << "f(" << x << ")=" << result<<endl;
    cout << "***********************" << endl;

    system("pause");
    return 0;
}