Need help with a simple C++ assignment

The program below solves the Quadratic formula for real roots only, butit does not use C++ classes. Please re-design and re-implement the programso that it uses C++ classes.PLEASE ONLY GIVE ME THE SOURCE CODE, I DO NOT WANT A CPP FILE. Also I will run the program to make sure it works. Thank you so much!!#include <iostream>#include <iomanip>#include <cmath>#include <cstdlib>using namespace std;int main () { double a, b, c, disc = 0; cout << "Please enter your three coefficients for your quadratic equation "; cin >> a >> b >> c; if (!cin.eof() && cin.good() && a != 0) {  // system keyboard tests !cin.eof() and cin.good // test for eof from the keyboard and good input data in that order. The !cin.eof() // test has to come first to check if the user wants to bail without completing his // data entry. If the test cin.good is put first, the control-z or control-b input // will be understood as an invalid input, which is an undesirable side-effect. // a != 0 is an application test which rejects a value which equals zero // application tests always follow system tests and never precede them.  disc = b*b - 4*a*c; if (disc < 0) { cout << " No real roots"; } else if (disc == 0) { double root = -b/(2*a);  if (root == 0) root = abs(root); cout << " One real root; x = " << root; } else  { // show both roots double root1, root2; root1 = -b/(2*a) + sqrt (disc)/(2*a); root2 = -b/(2*a) - sqrt (disc)/(2*a); cout << " Two real roots; root1 = " << root1  << " and root2 = " << root2; } } else if (!cin.eof()) cout << " One or more invalid inputs"; cout << endl; return EXIT_SUCCESS;}