শুক্রবার, ৮ এপ্রিল, ২০১৬

Quadratic Equation Solver : Lab Assignment 


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#include <iostream>
#include <math.h>
#define sqr(x) (x*x)
using namespace std;
class QuadraticEquation{
private:
    double a;
    double b;
    double c;
    double root1;
    double root2;
    double imaginaryRootReal;
    double imaginaryRootImg;
    bool isImaginaryroot;


public:
    QuadraticEquation();
    void setCoefficient(double a,double b,double c);
    void solve();
    bool isImaginary();
    double getRoot1();
    double getRoot2();
    double ImagReal();
    double ImagImg();


};
QuadraticEquation::QuadraticEquation()
{
    cout<<"Quadratic Equation is represented in the form aX^2 + bX + c = 0 ."<<endl;
    isImaginaryroot = false;

}
void QuadraticEquation::setCoefficient(double a,double b,double c)
{
    this->a  =a;
    this->b = b;
    this-> c = c;
}
void QuadraticEquation::solve()
{
double DETERMINANT;
DETERMINANT = sqr(b) - 4*a*c;
if(DETERMINANT<0)
{
    isImaginaryroot = true;
    DETERMINANT*=-1;
    imaginaryRootReal = -b/(2*a) ;
    imaginaryRootImg = sqrt(DETERMINANT)/(2*a);
    return;

}

root1 = (b + sqrt(DETERMINANT) )/(2*a);
root2 = (b - sqrt(DETERMINANT) )/(2*a);
}
bool QuadraticEquation::isImaginary()
{
    if(isImaginaryroot)
        return true;
    return false;
}
double QuadraticEquation::getRoot1()
{
    return root1;
}
double QuadraticEquation::getRoot2()
{
    return root2;
}
double QuadraticEquation::ImagReal()
{
    return imaginaryRootReal;
}
double QuadraticEquation::ImagImg()
{
    return  imaginaryRootImg;
}
int main()
{
    QuadraticEquation quadEqn;
    double a,b,c;
    cin>>a>>b>>c;

    quadEqn.setCoefficient(a,b,c);
    quadEqn.solve();
   if(quadEqn.isImaginary())
    {
        cout<<"The imaginary roots are "<<quadEqn.ImagReal()<<" + "<<quadEqn.ImagImg()<<"i"<<endl;
        cout<<"and "<<quadEqn.ImagReal()<<" - "<<quadEqn.ImagImg()<<"i"<<endl;

    }
    else
    {
        cout<<"The real roots are "<<quadEqn.getRoot1()<<endl;
        cout<<" and "<<quadEqn.getRoot2()<<endl;
    }

    return 0;
}
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