Help please

[Brandon33310]

Please help me with this, it is supposed to find all roots of a quadratic formula. I can't get it to work, what is wrong? :(


#include <iostream>
#include <cmath>


using namespace std;

int main()
{

/*
----------------------------------------------------
This program is by Brandon Cavendish. 9/7/2017
It will find the real roots for a quadratic equation

if > 0
If == 0 (repeated)
if < 0


x1, x2 = -b+-sqrt(b^2-4ac)/2a
----------------------------------------------------
*/
// declaring variables.
double a = 0.0;
double b = 0.0;
double c = 0.0;
double x1 = 0.0;
double x2 = 0.0;
double realPart = 0.0;
double imaginaryPart = 0.0;
char Response;


double discriminant = b * b - 4 * a * c;

cout << "Enter A:" << endl;
cin >> a;
cout << "Enter B:" << endl;
cin >> b;
cout << "Enter C:" << endl;
cin >> c;

if (discriminant > 0) {
x1 = (-b + sqrt(discriminant)) / (2*a);
x2 = (-b - sqrt(discriminant)) / (2*a);
cout << "Roots are real and different." << endl;
cout << "x1 = " << x1 << endl;
cout << "x2 = " << x2 << endl;
}

else if (h == 0) {
cout << "Roots are real and same." << endl;
x1 = (-b + sqrt(discriminant)) / (2*a);
cout << "x1 = x2 =" << x1 << endl;
}

else if (discriminant < 0) {
realPart = -b/(2*a);
imaginaryPart =sqrt(-discriminant)/(2*a);
cout << "Roots are complex and different." << endl;
cout << "x1 = " << realPart << "+" << imaginaryPart << "i" << endl;
cout << "x2 = " << realPart << "-" << imaginaryPart << "i" << endl;
}
cout << "Would you like to go again Y or N?" << endl;
cin >> Response;



while(Response == 'Y' || Response == 'y'){


cout << "Enter A:" << endl;
cin >> a;
cout << "Enter B:" << endl;
cin >> b;
cout << "Enter C:" << endl;
cin >> c;

if (discriminant > 0) {
x1 = (-b + sqrt(discriminant)) / (2*a);
x2 = (-b - sqrt(discriminant)) / (2*a);
cout << "Roots are real and different." << endl;
cout << "x1 = " << x1 << endl;
cout << "x2 = " << x2 << endl;
}

else if (discriminant == 0) {
cout << "Roots are real and same." << endl;
x1 = (-b + sqrt(discriminant)) / (2*a);
cout << "x1 = x2 =" << x1 << endl;
}

else if (discriminant < 0 ){
realPart = -b/(2*a);
imaginaryPart =sqrt(-discriminant)/(2*a);
cout << "Roots are complex and different." << endl;
cout << "x1 = " << realPart << "+" << imaginaryPart << "i" << endl;
cout << "x2 = " << realPart << "-" << imaginaryPart << "i" << endl;

}

cout << "Would you like to go again Y or N?" << endl;
cin >> Response;
}

cout << "The end" << endl;

return 0;
}

[JayhawkZombie]

For one, it doesn't help that you calculate the discriminant before you get the input.

[48T7M4Gy]

http://www.cplusplus.com/forum/general/222488/ DUPLICATE ALREADY BEING WORKED ON

[48T7M4Gy]

@Brandon Stick with one and only one thread if its about the same program. Pick one that suits you and close all the others you have duplicated with a green tick.

Duplicates waste peoples time and effort and don't help your cause at all :)