Application File:

#include <cstdlib>
#include <iostream>
#include "Triangle.h"
#include <cmath>
using namespace std;

int main()
{

    Triangle Driver_Object();

    cout << Driver_Object() << endl;

    cout.operator<< (os, object);

    Driver_Object.setName(right-tri);
    for (int i=0; i<3; i++){
        Driver_Object.setSide(i+3);
    }
    Driver_Object.Perimeter(perimeter);

    outfile << theTriangle << endl;
    theTriangle.setLeg( 6, 0 );
    theTriangle.setLeg( 8, 1 );
    theTriangle.setLeg( 10, 2 );
    outfile << theTriangle << endl;


    while( infile >> theTriangle ) {
    cout << theTriangle << endl;
    }

    system("PAUSE");
    return 0;
}



Implementation File:

#include <cstdlib>
#include <iostream>
#include "Triangle.h"
#inclue <string>

using namespace std;

    Triangle::Triangle (){
        Name = "no_name";
        for (int i=0; i<3; i++){
            Side[i]=0;
        }
    }

    double Triangle::Perimeter(double perimeter){
        for (int i=0; i<3; i++){
            Side[i+1]+=Side[i];
        }
    }

    string Triangle::getName(){
        return Name;
    }

    string Triangle::setName(new_name){
        new_name = Name;
        return new_name;
    }

    double Triangle::getSide(){
        return Side;
    }

    double Triangle::setSide(new_side, int index){
        Side[index] = new_side;
        return new_side;
    }

    friend bool operator< (const Triangle& lhs, const Triangle& rhs){
        bool comparison;
        if (lhs.perimeter() < rhs.perimeter()){
            comparison = true;
        }
        else comparison = false;
        return comparison;
    }

    friend ostream& operator<< (ostream& os, const Triangle object){
        Name = name;
        Side = side;
         os<<object.name<<" ";
        for (int i=0; i<3; i++){
           os<<object.side[i]<<" ";
    }

    friend istream& operator>> (istream& inFile, const& Triangle object){
        if (!inFile){
            cout << "There was an error reading your file." << endl'
            exit(1);
        }
        while (inFile>>object){
            cout << object << endl;
        }
    }

    bool Triangle::isEquilateral(){
        bool comparison;
        for (int i=1; i<3; i++){
            for (int j=0; j<3; j++){
                if (abs(Side[i]-Side[j]) <= .001){
                    comparison = true;
                }
                else comparison = false;
            }
        }
    }


Class Header File:

#pragma once

#include <cstdlib>
#include <iostream>

using namespace std;

class Triangle {

public:

    Triangle ();

    double Perimeter(double perimeter);

    string getName();

    string setName(string new_name);

    double getSide();

    double setSide();

    friend bool operator< (const Triangle& lhs, const Triangel& rhs);

    friend ostream& operator<<(ostream& os, const Triangle object);

    friend istream& operator>>(istream inFile, const Triangle object);

    bool isEquilateral ();

private:
    double Side[];
    string Name;

};