Wonyoung Lee Machine Problem #4

// Wonyoung Lee CPS 171 Machine Problem3.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>

using namespace std;


int main()
{
    int userUnit = 0;       // amount of unit user entered.
    int userIRent = 0;      // cost of initial rent(fullly occupied).
    int userIncreFee = 0;   // if one unit become vacant, the amount of fee increase.
    int userMaintain = 0;   // amount of maintain fee per each occupied unit.

    int totalIncome = 0;    // save total income
    int maximumCost = 0;    // maximum cost
    int maxCostUnit = 0;    // amount of unit when get maximum cost.

    cout << "Enter the total number of units: ";                            //get total units.
    cin >> userUnit;

    cout << "Enter the cost when your apartment fully occupied: ";          //get initial cost.
    cin >> userIRent;

    cout << "Enter the increase in rent that results in a vacant unit: ";   //get rate of increase fee.
    cin >> userIncreFee;

    cout << "Enter the amount to maintain fee for a occupied unit: ";                   //get occupied units maintain fee.
    cin >> userMaintain;

    int n = 0;              // using for statement.


    for ( n = userUnit ; n > 0 ; n--)
    {
        totalIncome = userUnit * userIRent - userUnit * userMaintain;

        if (totalIncome > maximumCost) {
            maximumCost = totalIncome;          //save maximum cost
            maxCostUnit = userUnit;             //save amount of unit.
        }

        userUnit -= 1;
        userIRent += userIncreFee;
    }

    cout << endl << endl;
    cout << "If user rent " << maxCostUnit << " units user can get maximum cost " << maximumCost << " dollors." << endl;


    return 0;
}