// Program to find out roots of a quadratic equation.
// Assignment-05
// quadeq.cpp, Author - Krishna Kumar Khatri.

// Uncomment ONLY the following line if you are using Turbo/Borland compiler.
// #define TC
#ifdef TC
	#include <iostream.h>
	#include <math.h>
#else
	#include <iostream>
	#include <cmath>
	using namespace std;
#endif
#include <conio.h>  // For getch.

short sign(const int& val)
    { return val < 0 ? -1 : (val > 0 ? 1 : val); }

int main()
{
    #ifdef TC
        clrscr();
    #endif
    static int a, b, c;
    int deter = 0;
    float res;
    
    cout << "For equation, ax^2 + bx + c = 0" << endl
         << "enter a, b, and c's values: ";
    cin >> a >> b >> c;
    
    deter = b * b - 4 * a * c;
    cout << endl;
    
    switch (sign(deter)) {
        case -1:
            cout << "Roots are imaginary.";
            break;
        case 0:
            cout << "Roots are equal, and each is " << -b / (2 * a);
            break;
        case 1:
            cout << "First root is, " << (-b + sqrt((double)deter)) / (2 * a);
            cout << " and second one is, " 
                 << (-b - sqrt((double)deter)) / (2 * a);
            break;
    }

    cout << endl << endl << "Program over. Press any key to exit...";
    getch();
    return 0; // Successful termination.
}