Having trouble with the sqrt() function.

I'm getting strage output with the sqrt() function in a quadratic formula program. I'll also add that I had the same problem using pow(x,.5). It's definitely the function that's causing the problem, I've made sure of it.

Code:

`#include <iostream>`

#include <iomanip>

#include <cmath>

using namespace std;

void quad(double, double, double, double&, double&);

int main() {

double a, b, c, x1, x2;

cout.setf(ios::fixed, ios::floatfield);

cout.setf(ios::showpoint);

cout << "Enter the values of A, B, and C for the quadratic equation."

<< "\n>";

cin >> a >> b >> c;

cin.ignore(3,'\n');

quad(a,b,c,x1,x2);

cout << setprecision(2) << "X = " << x1 << " or " << x2 << ".";

cin.get();

return 0;

}

void quad(double a, double b, double c, double& xPos, double& xNeg) {

if (2*a != 0 && (b*b - 4*a*c) < 0) {

xPos = (-b + sqrt(b*b - 4*a*c))/(2*a);

xNeg = (-b - sqrt(b*b - 4*a*c))/(2*a);

}

else {

xPos = 0;

xNeg = 0;

}

return;

}

Output:

Code:

`Enter the values of A, B, and C for the quadratic equation.`

>3 4 5

X = -1.#J or -1.#J.