C++

Introduction to Programming with C++ (3rd Edition) by Daniel Liang Chapter 9 Problem 6PE

I have the main function and UML diagram already. I just need the class header file to complete the program, the textbook solution does not include it.

(Algebra: quadratic equations) Design a class named class QuadraticEquation for a quadratic equation ax2 + bx + x = 0. The class contains: class Data fields a , b , and c that represent three coefficients. A constructor for the arguments for a , b , and c. Three get functions for a , b , and c. A function named getDiscriminant() that returns the discriminant, which is b2 - 4ac. The functions named getRoot1() and getRoot2() for returning two roots of the equation: These functions are useful only if the discriminant is nonnegative. Let these func tions return 0 if the discriminant is negative. Draw the UML diagram for the class. Implement the class. W class class rite a test program that prompts the user to enter values for a , b , and c , and displays the result based on the discriminant. If the discriminant is positive, display the two roots. If the discriminant is 0, display the one root. Otherwise, display The equation has no real roots.

//Main function, just need the header file with class QuadraticEquation and the corresponding functions!

int main() { //Prompt the user to get the inputs for a, b and c. // Variable declaration double a, b, c, d; cout << "Enter a: "; cin >> a; cout << "Enter b: "; cin >> b; cout << "Enter c: "; cin >> c; // Create an object QuadraticEquation quad(a, b, c); // Invoke the function d = quad.getDiscriminant(); cout << "The given values " << endl; // Invoke the functions cout << "The value of a: " << quad.getA() << endl; //If the value of d is negative, display that the equation has no roots. if (d < 0) { cout << "The equation has no roots" << endl; } //If the value of d is 0, display the output with value for root1. else if (d == 0) { cout << "The root is " << quad.getRoot1() << endl; } //If the value of d is positive, display the output with values for root1 and root2. else { cout << "The roots are " << quad.getRoot1() << " and "<< quad.getRoot2() << endl; } // Pause the system system("pause"); //Return the value return 0; }