Blackone

// Source: thetripproblem.cpp
// Author: Jeffrey Cartagena
// Date: May 2, 2009

#include <iostream>
#include <fstream>
#include <cmath>
using namespace std;

// Global variables
double *allMoney;

// Prototypes
void readFromFile(ifstream &inFile, int & qty);
void writeToFile(ofstream & outFile, double exchagedMoney);
double calculateExchangedMoney(int qty);

int main()
{
    ifstream inFile;
    ofstream outFile;
    int qty;


    try
    {
        inFile.open("input.in");
        outFile.open("output.out");
    }

    catch(...)
    {
        cout << "There are problems opening the files\n";
        cin.ignore();
        return 1;
    }

    readFromFile(inFile, qty);
    while(!inFile.eof())
    {
        double exchangedMoney = calculateExchangedMoney(qty);
        delete[] allMoney;
        writeToFile(outFile, exchangedMoney);
        readFromFile(inFile, qty);
    }
    delete[] allMoney;
    cout << "Finishing the problem\n";
    cin.ignore();
    inFile.close();
    outFile.close();
    return 0;
}

double calculateExchangedMoney(int qty)
{
    double total = 0.0;
    double average = 0.0;
    int count = 0;

    for(int i=0; i < qty; i++)
        average += allMoney[i];


    average = average / qty;

    for(int j=0; j<qty; j++)
        if(allMoney[j] - average > 0)
        {
            total += allMoney[j] - average;
            if(fmod(total, .01) <= 0.009)
                total = total - (fmod(total, .01));
        }
    return total;
}

void writeToFile(ofstream & outFile, double exchangedMoney)
{
    if(fmod(exchangedMoney, 01) >= 0.009)
        outFile << '$' << exchangedMoney << endl;
    else
        outFile << '$' << exchangedMoney << ".00" << endl;
}

void readFromFile(ifstream & inFile, int & qty)
{
    try
    {
        inFile >> qty;
        allMoney = new double[qty];

        for(int i=0; i<qty; i++)
            inFile >> allMoney[i];
    }
    catch(...)
    {
        cout << "There are problems in the format of the input File\n";
        exit(1);
    }
}