Question

Design a class named QuadraticEquation for a quadratic equation ax^2+bx+x=0. The class contains: **private data fields a, b, and c that represents three coefficients. **a constructor for the arguments for a, b, and c. **three get methods for a, b, and c. **a method named getDiscriminant() that returns the discriminant, which is b2-4ac **the methods named getRoot1() and getRoot2() for returning two roots of the equation, or returning 0 if the discriminant is negative.[/color]

Answer 1

C++

///////////////////////////////////////////////////////////////////////////////////////////

#include <iostream>

using namespace std;

//////////////////////////////////////////////////////////////////

class QuadraticEquation {

int a, b, c;

public:

QuadraticEquation(int a, int b, int c) {

this->a = a;

this->b = b;

this->c = c;

}

////////////////////////////////////////

int getA() {

return a;

}

int getB() {

return b;

}

int getC() {

return c;

}

////////////////////////////////////////

// returns the discriminant, which is b2-4ac

int getDiscriminant() {

return (b*2)-(4*a*c);

}

int getRoot1() {

if (getDiscriminant() < 0)

return 0;

else {

// Please specify how to calculate the two roots.

return 1;

}

}

int getRoot2() {

if (getDiscriminant() < 0)

return 0;

else {

// Please specify how to calculate the two roots.

return -1;

}

}

};

//////////////////////////////////////////////////////////////////

int main() {

return 0;

}