Hello I need help with this project //Please note I cant use any global variable

Question

Hello I need help with this project

//Please note I cant use any global variables or std:: libraries

//I've posted my code from my last project under the this project description if that helps for any reference

//THIS IS MY CODE FROM LAST PROJECT

/*Content of cars.txt before reading*/

2014 Toyota Tacoma 115.12 false
2015 Ford Fusion 90.89 true
2009 Dodge Neon 45.25 false
2015 Ford F150 112.83 true
2016 Subaru Outback 71.27 true

Description: This project will expand Project 2 by adding additional functionality, using pointers, and implementing abstract data types (ADTs) through classes. Pointers must be used for all array manipulation, including arrays with ADTs (structs, classes) e.g, rental cars, rental agencies. Pointers must be used in function prototypes and function parameter lists - not square brackets. Make sure all your C-string functions (e.g. string copy, string compare, etc.) work with pointers (parameters list and function implementation). Sauare brackets are to be used only when larin pointer back to the base address using the array name can be used to move through arrays. All pointers must be passed by value. (Note: Try to also get accustomed to using the arrow operator (->) with Class Object pointers for member access if you use such in your code.) ble. Remember: pointer arithmetic (e.g., ++ , +-, - -, --) and setting the The new functionality is as follows: You are given an updated data file (e.g. Agencies.txt) where there are 3 rental Car Agency locations, where each of the 3 locations (RentalAgency) has 5 cars (RentalCar). You will have similar menu options, but the functionality has been updated below. Note: using multiple helper functions to do smaller tasks will make this project significantly easier. You may want to create a function that will get a car from a location based on the location and car indices The RentalCar Class will contain the following private data members: m year, an int (year of production) m_make, a C-string (char array of 256 maximum size) m model, a C-string (char array of 256 maximum size) m_price, a float (price per day) m_available, a bool (1true; 0false; try to display true/false using the "std: :boolalpha" manipulator like: cout

Explanation / Answer

RentalAgency.h

#ifndef SCHOOL_RENTALAGENCY_H
#define SCHOOL_RENTALAGENCY_H

#include "RentalCar.h"

#define MAX_CSTRING_SIZE 255
#define AGENCIES_IN_FILE 3
#define ZIPCODE_SIZE 5
#define INVENTORY_SIZE 5

struct RentalAgency {
    char name[MAX_CSTRING_SIZE];
    int zipcode[ZIPCODE_SIZE];
    RentalCar inventory[INVENTORY_SIZE];
};

#endif //SCHOOL_RENTALAGENCY_H

RentalCar.cpp

#include <iostream>

#include "RentalCar.h"

using namespace std;
char *myStringCopy(char * destination, const char * source);

// Constructors
RentalCar::RentalCar() {
    m_year = -1;
    myStringCopy(m_make, "NOMAKE");
    myStringCopy(m_model, "NOMODEL");
    m_price = 0;
    m_available = false;
}

RentalCar::RentalCar(int year, const char *make, const char *model, float price, bool available) {
    m_year = year;
    myStringCopy(m_make, make);
    myStringCopy(m_model, model);
    m_price = price;
    m_available = available;
}

// Getters
int RentalCar::getYear() const {
    return m_year;
}

char *RentalCar::getMake() {
    return m_make;
}

char *RentalCar::getModel() {
    return m_model;
}

float RentalCar::getPrice() const {
    return m_price;
}

bool RentalCar::getAvailable() const {
    return m_available;
}

// Setters
void RentalCar::setYear(int year) {
    m_year = year;
}

void RentalCar::setMake(char *make) {
    myStringCopy(m_make, make);
}

void RentalCar::setModel(char *model) {
    myStringCopy(m_model, model);
}

void RentalCar::setPrice(float price) {
    m_price = price;
}

void RentalCar::setAvailable(bool available) {
    m_available = available;
}

// Other methods
void RentalCar::print() const {
    cout << m_year << " " << m_make << " " << m_model << ", Price: $" << m_price << ", Available: " << boolalpha
         << m_available << endl;
}

void RentalCar::estimateCost(int days) const {
    cout << "Estimated cost to rent the " << m_make << " " << m_model << " for " << days << " days: $" << m_price * days
         << endl;
}

RentalCar.h

#ifndef SCHOOL_RENTALCAR_H
#define SCHOOL_RENTALCAR_H

#define MAX_CSTRING_SIZE 255

class RentalCar {
    public:
    // Constructors
    RentalCar();
    RentalCar(int year, const char* make, const char* model, float price, bool available);

    // Getters
    int getYear() const;
    char* getMake();
    char* getModel();
    float getPrice() const;
    bool getAvailable() const;

    // Setters
    void setYear(int year);
    void setMake(char* make);
    void setModel(char* model);
    void setPrice(float price);
    void setAvailable(bool available);

    // Other methods
    void print() const;
    void estimateCost(int days) const;

    private:
    int m_year;
    char m_make[MAX_CSTRING_SIZE];
    char m_model[MAX_CSTRING_SIZE];
    float m_price;
    bool m_available;

};

#endif //SCHOOL_RENTALCAR_H

proj3.cpp

#include <iostream>
#include <fstream>

#include "RentalCar.h"
#include "RentalAgency.h"

using namespace std;

int menu();
int getIntBetween(int min, int max);
void fiveDigitIntToArray(int fiveDigitInt, int *arr);
void fiveDigitArrayFromFile(int *arr, ifstream &inf);
RentalAgency readRentalAgencyAndInventoryFromFile(ifstream &inf);
void readAllDataFromFile(RentalAgency * agencies);
void printRentalAgency(RentalAgency agency);
void printRentalAgencies(RentalAgency * agencies);
RentalCar readRentalCarFromFile(ifstream &inf);
RentalAgency selectAgency(RentalAgency * agencies);
RentalCar selectCar(RentalCar * cars);
void estimateRentalCost(RentalAgency * agencies);
void findMostExpensiveCar(RentalAgency * agencies);
void writeAvailableCarsToFile(RentalAgency * agencies);

// Custom string functions required by project spec
size_t myStringLength(const char * str);
int myStringCompare(const char * str1, const char * str2);
char *myStringCopy(char * destination, const char * source);
char * myStringCat(char * destination, const char * source);

int main() {
    RentalAgency agencies[AGENCIES_IN_FILE];
    ifstream inf;
    bool exit = false;
    int selection;

    do {
        selection = menu();
        switch (selection) {
            case 1: readAllDataFromFile(agencies); break;
            case 2: printRentalAgencies(agencies); break;
            case 3: estimateRentalCost(agencies); break;
            case 4: findMostExpensiveCar(agencies); break;
            case 5: writeAvailableCarsToFile(agencies); break;
            case 6: exit = true; break;
        }
    } while (!exit);

    return 0;
}

/*
* Display a menu to the user and prompt user for selection
*/
int menu() {
    cout << "What would you like to do?" << endl;
    cout << "1) Read rental agency data from file" << endl;
    cout << "2) Show rental agencies and cars" << endl;
    cout << "3) Estimate car rental cost" << endl;
    cout << "4) Find most expensive car" << endl;
    cout << "5) Write available cars to file" << endl;
    cout << "6) Exit" << endl;

    return getIntBetween(1, 6);
}

/*
* Prompt user for an integer between min and max, inclusive.
* NOTE: This function completely blows up user enters non-integer
*/
int getIntBetween(int min, int max)
{
    int selection;

    // Prompt until valid selection entered
    do {
        cout << "Enter selection (" << min << "-" << max << "): ";
        cin >> selection;   // TODO: Prevent non-integer input infinite loop

    } while (selection < min || selection > max);

    return selection;
}

/*
* Convert a five digit integer to an int array.
* This function uses modulous to extract the trailing digit from a base-10 integer, then stores those digits
* in a target int array working from end to beginning.
*/
void fiveDigitIntToArray(int fiveDigitInt, int *arr) {
    int digit;
    int *arrEnd = arr + ZIPCODE_SIZE - 1;

    while (fiveDigitInt >= 10) {
        digit = fiveDigitInt % 10; // Get last digit of base-10 int
        *arrEnd-- = digit;          // Fill array in reverse, because we're pulling digits from the end of fiveDigitInt
        fiveDigitInt /= 10;         // Chop last digit off base-10 int
    }
    *arrEnd = fiveDigitInt;         // At loop end, fiveDigitInt only contains final (first) digit
}

/*
* Read a five digit integer from an ifstream and pass to fiveDigitIntToArray(). Mainly a helper function.
*/
void fiveDigitArrayFromFile(int *arr, ifstream &inf) {
    int fiveDigitInt;
    inf >> fiveDigitInt;
    fiveDigitIntToArray(fiveDigitInt, arr);
}

/*
* Read in a single rental agency and all of it's associated inventory data from an ifstream.
*/
RentalAgency readRentalAgencyAndInventoryFromFile(ifstream &inf) {
    RentalAgency agency;
    RentalCar car;
    RentalCar *inventory = agency.inventory;

    inf >> agency.name;
    fiveDigitArrayFromFile(agency.zipcode, inf);
    for (int i = 0; i < INVENTORY_SIZE; i++) {
        car = readRentalCarFromFile(inf);
        *inventory++ = car;
    }

    return agency;
}

/*
* Prompt user for input filename, then read in all rental agency and rental car data until file is exhausted.
*/
void readAllDataFromFile(RentalAgency * agencies) {
    ifstream inf;
    char filename[MAX_CSTRING_SIZE];

    cout << "Infile name: ";
    cin >> filename;

    inf.open(filename);
    if (inf) {

        for (int i = 0; i < AGENCIES_IN_FILE; i++) {
            RentalAgency & agency = *agencies++;
            agency = readRentalAgencyAndInventoryFromFile(inf);
        }

    } else {
        cerr << "Unable to open file " << filename << endl;
    }

    inf.close();
}

/*
* Print rental agency data, including inventory details
*/
void printRentalAgency(RentalAgency agency) {
    int *arrPtr = agency.zipcode;
    RentalCar *inventory = agency.inventory;

    // Print name and zipcode
    cout << agency.name << " - ";
    for (int i = 0; i < ZIPCODE_SIZE; i++) {
        cout << *arrPtr++;
    }
    cout << endl;

    // Print inventory
    for (int i = 0; i < INVENTORY_SIZE; i++) {
        inventory->print();
        inventory++;
    }
    cout << endl;
}

/*
* Helper function to print all rental agencies data. Mainly calls printRentalAgency()
*/
void printRentalAgencies(RentalAgency * agencies) {
    for (int i = 0; i < AGENCIES_IN_FILE; i++) {
        printRentalAgency(*agencies++);
    }
}

/*
* Read in one rental car's data from an ifstream
*/
RentalCar readRentalCarFromFile(ifstream &inf) {
    int year;
    char make[MAX_CSTRING_SIZE], model[MAX_CSTRING_SIZE];
    float price;
    bool available;

    inf >> year >> make >> model >> price >> available;
    RentalCar car(year, make, model, price, available);

    return car;
}

/*
* Prompt user to select a rental agency by entering an integer 1-3
*/
RentalAgency selectAgency(RentalAgency * agencies) {
    int selection;
    RentalAgency agency;
    RentalAgency * agenciesStart = agencies;

    cout << "Please select an agency." << endl;
    for (int i = 0; i < AGENCIES_IN_FILE; i++) {
        cout << i + 1 << ") " << agencies->name << endl;
        agencies++;
    }
    agencies = agenciesStart;   // Reset pointer after iterating
    selection = getIntBetween(1, AGENCIES_IN_FILE) - 1;
    agency = *(agencies + selection);

    return agency;
}

/*
* Prompt user to select a rental car by entering an integer 1-5
*/
RentalCar selectCar(RentalCar * cars) {
    int selection;
    RentalCar * carsIterator = cars;

    cout << "Please select a car." << endl;
    for (int i = 0; i < INVENTORY_SIZE; i++) {
        cout << i + 1 << ") ";
        carsIterator->print();
        carsIterator++;
    }
    selection = getIntBetween(1, INVENTORY_SIZE) - 1;

    return *(cars + selection);
}

/*
* Calculate the estimated cost to rent a car for a user-input number of days, then print to screen
*/
void estimateRentalCost(RentalAgency * agencies) {
    RentalAgency agency;
    RentalCar car;
    int days;

    agency = selectAgency(agencies);
    car = selectCar(agency.inventory);

    cout << "For how many days would you like to rent the " << car.getMake() << " " << car.getModel() << "?" << endl;
    days = getIntBetween(1, 100);
    car.estimateCost(days);
}

/*
* Locate the rental car with the greatest m_price member and print to screen
*/
void findMostExpensiveCar(RentalAgency * agencies) {
    RentalCar car, mostExpensiveCar = *(agencies->inventory);
    RentalCar * inventory;

    for (int i = 0; i < AGENCIES_IN_FILE; i++) {
        inventory = agencies->inventory;
        for (int j = 0; j < INVENTORY_SIZE; j++) {
            car = *inventory;
            if (car.getPrice() > mostExpensiveCar.getPrice()) {
                mostExpensiveCar = car;
            }
            inventory++;
        }
        agencies++;
    }

    cout << "Most expensive car: ";
    mostExpensiveCar.print();
}

/*
* Prompt user to enter output file and write all available rental cars to that file
*/
void writeAvailableCarsToFile(RentalAgency * agencies) {
    char filename[MAX_CSTRING_SIZE];
    ofstream of;
    RentalCar car;
    RentalCar * inventory;
    int * zipcode;

    cout << "Name of file to write cars to: ";
    cin >> filename;

    of.open(filename);
    if (of) {

        for (int i = 0; i < AGENCIES_IN_FILE; i++) {
            inventory = agencies->inventory;
            zipcode = agencies->zipcode;

            of << agencies->name << " ";
            for (int k = 0; k < ZIPCODE_SIZE; k++) {
                of << *zipcode++;
            }
            of << endl;

            for (int j = 0; j < INVENTORY_SIZE; j++) {
                car = *inventory;
                if (car.getAvailable()) {
                    of << car.getYear() << " " << car.getMake() << " " << car.getModel() << " " << car.getPrice() << " "
                       << car.getAvailable() << endl;
                }
                inventory++;
            }
            of << endl;
            agencies++;
        }

    } else {
        cerr << "Unable to open file " << filename << endl;
    }

    of.close();
}

/*
* Find the length of a string, not including the null-terminator
*/
size_t myStringLength(const char * str) {
    size_t i = 0;

    while (*str++) {
        i++;
    };

    return i;
}

/*
* Compare two strings. Return -1 of str1 is less than str2, 1 if the opposite, 0 if they're identical
*/
int myStringCompare(const char * str1, const char * str2) {
    while (*str1 && *str2 && *str1 == *str2) {
        str1++;
        str2++;
    }

    return *str1 - *str2;
}

/*
* Copy a source string to a destination string
*/
char *myStringCopy(char * destination, const char * source) {
    while ((*destination++ = *source++))
        ;

    return destination;
}

/*
* Concatenate a source string onto the end of a destination string
*/
char *myStringCat(char * destination, const char * source) {
    // Find end of destination
    while (*destination) {
        destination++; // Leaves destination pointing to null character
    }

    // Copy source onto end of destination
    while ((*destination++ = *source++))
        ;

    return destination;
}

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