C++ Program of Quadratic Equation

Name: Quadratic Equation Solver
By:  Cenelia Gonzales
Description: This program can be use to solve Quadratic Equation or second-order polynomial equation with one variable "X".

Below is the screenshot of the program. The quadratic equation is in the form of A(X^2)+BX+C=0. I entered below the equation, X^2+4X-12=0, with their coefficients, A=1, B=4, and C=-12. Then, it displayed the two roots of the equation which is 2 and -6.

//Below are the Codes of the Progam:

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

#define sqr(x) (x)*(x)
#define clrscr() system("cls");

int main()
{

    cout << "\t\t\tQUADRATIC EQUATION FORM:\n\n";
   cout << "\t\t\t     A(X^2)+BX+C=0\n\n";
   cout << "ENTER COEFFICIENTS:\n";
    float A, B, C, Delta;
cout << "  A = ";
cin >> A;
cout << "  B = ";
cin >> B;
cout << "  C = ";
cin >> C;
cout << endl;
    if(A == 0 && B != 0)
    {
        cout << "THIS EQUATION IS A FIRST DEGREE EQUATION\n";
    cout << "THE SOLUTION IS: " << -C/B << endl;
    }
    else if(A == 0 && B == 0)
    {
    cout << "THIS EQUATION HAS NO SOLUTION";
    }
    else
    {
        Delta = sqr(B) - 4*A*C;
        if(Delta < 0)
        {
        cout << "THIS EQUATION DONT HAVE ANY REAL ROOTS";
        }
        else if(Delta == 0)
        {
        cout << "THIS EQUATION HAVE A SINGLE ROOT: " << -B/(2*A) << endl;
        }
        else
        {
        cout << "THIS EQUATION HAVE TWO REAL ROOTS" << endl;
           
            float X1 = (-B + sqrt(Delta)) / (2 * A);
            float X2 = (-B - sqrt(Delta)) / (2 * A);

        cout << "  X1 = " << X1 << endl;
    cout << "  X2 = " << X2 << endl;
        }
    }


cout << "\nTHANKS FOR USING THIS PROGRAM!" << endl;
cin.get();
cin.get();
    return 0;
}