// quadratic.cpp
// Computes the value of a quadratic expression.

#include <iostream>

using namespace std;

int main()
{
   // Announce purpose of program:
   cout << "This program computes the value of "
                << "a quadratic expression." << endl;

   // Input coefficients from user:
   cout << "Enter value of quadratic coefficient a:>";
   float a;      // to be input from user
   cin >> a;
   cout << "Enter value of linear coefficient b:>";
   float b;      // to be input from user
   cin >> b;
   cout << "Enter value of constant term c:>";
   float c;      // to be input from user
   cin >> c;

   // Input value of variable x:
   cout << "Enter value of variable x:>";
   float x;      // to be input from user
   cin >> x;

   // Compute value of quadratic expression:
   float y = a*x*x + b*x + c;

   // Output results:
   cout << "The value of the quadratic expression is "
                    << y << endl;

   return 0;
}  // function main