file where I want it to be

// Author: Chris Christoff
// Current Build: 4.2.3
// Last build time: 8:55 A.M/ 6/12/2012

#include "assign5.h"
#include <iostream>
#include <fstream>
#include <cmath>
#include <limits>
#include <stdlib.h>
using namespace std;

quadratic::quadratic()
{

}

quadratic::fStruct quadratic::readCoeffs()
{
    fStruct fVars;
    char coef[]= {'a','b','c'};
    for (int i=0; i<3; i++)
    {
        while (((cout << "Enter coefficient for "<<coef[i]<<": ") && !(cin >> fVars.coeffs[i])) || cin.peek() != '\n')
        {
            cout << "Invalid Input."  << endl;
            cin.clear();
            cin.ignore(numeric_limits<streamsize>::max(), '\n');
        }
    }

    return fVars;
}

double quadratic::f(quadratic::fStruct fVars, double x)
{
    double a = fVars.coeffs[0];
    double b = fVars.coeffs[1];
    double c = fVars.coeffs[2];
    double fOfX = ((a*(pow(x,2.0))) + (b*x) + c);

    return fOfX;
}

double quadratic::bisect(double xLeft, double xRight, double epsilon, quadratic::fStruct fVars, bool& error)
{
    quadratic q;

    double xMid;
    double fMid;

    double fLeft = q.f(fVars, xLeft);
    double fRight = q.f(fVars, xRight);

    error = (fLeft * fRight) > 0;

    if(error)
        return -999.0;

    while(fabs(xLeft-xRight)>epsilon)
    {
        xMid = (xLeft + xRight) / 2.0;
        fMid = q.f(fVars, xMid);

        if(fMid==0.0)
            return xMid;
        else if ((fLeft * fMid) < 0.0)
            xRight = xMid;
        else
            xLeft = xMid;
    }

    return (xLeft+xRight) / 2.0;
}

void quadratic::toFile(quadratic::fStruct fVars, quadratic::rootStruct rootStruct)
{
    double a = fVars.coeffs[0];
    double b = fVars.coeffs[1];
    double c = fVars.coeffs[2];

    ofstream dataStore;
    dataStore.open("results.dat", ios::out | ios::app);
    dataStore << endl << "Quadratic equation with the following coefficients: " << endl << "a: "
    << a << " b: " << b << " c: " << c << endl << "has the following roots" << endl << "Root1: "
    << rootStruct.roots[0] << " Root2: " << rootStruct.roots[1] << endl;
    return;
}

void quadratic::toScreen(quadratic::fStruct fVars)
{
    double a = fVars.coeffs[0];
    double b = fVars.coeffs[1];
    double c = fVars.coeffs[2];

    cout << "The solution of a quadratic equation with coefficients:" << endl << "a=" << a << ", b="
<< b << ", c=" << c << endl << "has not been found." << endl;
    return;
}

void quadratic::linear(quadratic::fStruct fVars, double root)
{
    double a = fVars.coeffs[0];
    double b = fVars.coeffs[1];
    double c = fVars.coeffs[2];

    cout << "Linear equation with coefficients:" <<endl << "b: " << b << "  c: " << c << endl<<"Has root: "<<root <<endl;

    ofstream dataStore;
    dataStore.open("results.dat", ios::out | ios::app);
    dataStore << endl << "Linear equation with coefficients:" <<endl <<" b: " << b << "  c: " << c << endl<<"Has root: " <<root <<endl;
    return;
}
void QuickTest(double a, double b, double c)
{
    if (a==0.0 && b==0.0 && c!=0.0)  // Horizontal line
    {
        cout << "By definition, the root of  the horizontal line is" << c <<endl;
        ofstream dataStore;
        dataStore.open("results.dat", ios::out | ios::app);
        dataStore << endl << "By definition, the roof of  the horizontal line is" << c <<endl;
        exit(1);
    }
    else if (a==0.0 && c==0.0 && b!=0.0)  // Always 0
    {
        cout << "By definition, if a and c are zero, and b is defined, the root is always at 0." <<endl;
        ofstream dataStore;
        dataStore.open("results.dat", ios::out | ios::app);
        dataStore << endl << "By definition, if a and c are zero, and b is defined, the root is always at 0." <<endl;
        exit(2);
    }
    else if (a==0.0 && c==0.0 && c==0.0)
    {
        cout << "When all three coeff's are 0, there is no root." <<endl;
        ofstream dataStore;
        dataStore.open("results.dat", ios::out | ios::app);
        dataStore << endl << "When all three coeff's are 0, there is no root." <<endl;
        exit(3);
    }

    else
    {
        cout<< "An Error Has Occured. Program Terminated."<<endl;
        ofstream dataStore;
        dataStore.open("results.dat", ios::out | ios::app);
        dataStore << endl << "An error has occurred! Error code: 1." <<endl;
        exit(4);
    }
}