Design a class named QuadraticEquation for a quadratic equation

Question

. The class contains:



• Data fields a, b, and c that represents 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







• The functions named getRoot1() and getRoot2() for returning two roots of the equation











These functions are useful only if the discriminant is non-negative. Let these functions return 0 if the discriminant is negative.







Draw the UML diagram for the class. Implement the class. Write a test program that prompts the user to e

Answer 1

```
#include
using namespace std;

class QuadraticEquation
{
private:
int a;
int b;
int c;

public:
QuadraticEquation(double a, double b, double c)
: a(a), b(b), c(c)
{
}

double getA()
{
return a;
}

double getB()
{
return b;
}

double getC()
{
return c;
}

double getDiscriminant()
{
return b * b - 4 * a * c;
}

double getRoot1()
{
if (getDiscriminant() < 0)
return 0;
else
{
return (-b + getDiscriminant()) / (2 * a);
}
}

double getRoot2()
{
if (getDiscriminant() < 0)
return 0;
else
{
return (-b - getDiscriminant()) / (2 * a);
}
}
};

int main()
{
cout << "Enter a, b, c: ";
double a, b, c, discriminant, r1, r2;
cin >> a >> b >> c;

QuadraticEquation equation(a, b, c);
discriminant = equation.getDiscriminant();

if (discriminant < 0)
{
cout << "The equation has no roots" << endl;
}
else if (discriminant == 0)
{
cout << "The root is " << equation.getRoot1() << endl;
}
else // (discriminant >= 0)
{
cout << "The roots are " << equation.getRoot1() << " and "
<< equation.getRoot2() << endl;
}

return 0;
}
```