Expert answer:Need help with a simple C++ assignment

Answer & Explanation:The program below solves the Quadratic formula for real roots only, but
it does not use C++ classes.  Please re-design and re-implement the program
so 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 #include #include #include 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;}

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