Chapter 3 exercises

//Exercise 3.9

#include <string>

class Account {
public:

    Account (std::string accountName, int initialBalance)
        : name{accountName} {
            if (initialBalance > 0){
                balance = initialBalance;
            }
        }

    void deposit(int depositAmount){
        if (depositAmount > 0) {
            balance += depositAmount;
        }

    }

    void withdraw(int withdrawAmount){
        if (balance > withdrawAmount) {
            balance -= withdrawAmount;
        }
        if (withdrawAmount > balance) {
            std::cout << "Withdrawal amount exceeded account balance." << std::endl;
        }
    }

    int getBalance() const{
        return balance;
    }

    void setName(std::string accountName){
        name = accountName;
    }

    std::string getName() const{
        return name;
    }
private:
    std::string name;
    int balance{0};
};



//Exercise 3.10 header file
//This header file contains the Invoice class for creating simple invoices
class Invoice{

public:
    Invoice(std::string partNumber, std::string partName, int partCost, int howMany)
        : partNum{partNumber}, partDescrip{partName} {
            if (partCost > 0){
                partPrice = partCost;
            }
            else partPrice = 0;
            if (howMany > 0) {
                partQuantity = howMany;
            }
            else partQuantity = 0;
        }

std::string getNum() const {
    return partNum;
}

void setNum(std::string partNumber) {
    partNum = partNumber;
    }

std::string getDescrip() const {
    return partDescrip;
    }

void setDescrip(std::string partName) {
    partDescrip = partName;
}

int getPrice() const{
     return partPrice;
}

void setPrice(int partCost) {
    if (partCost > 0)
        partPrice = partCost;
    else partPrice = 0;
}

int getQuantity() const {
    return partQuantity;
}

void setQuantity(int howMany) {
    if (howMany > 0)
        partQuantity = howMany;
    else partQuantity = 0;
}
int getInvoiceAmount() {
    int invoiceAmount{};
    invoiceAmount = getPrice() * getQuantity();
    return invoiceAmount;
}


private:
    std::string partNum;
    std::string partDescrip;
    int partPrice;
    int partQuantity;
};



//Exercise 3.10 main file
//This program demonstrates the functions of the Invoice.h class

#include <iostream>
#include <string>
#include "Invoice.h"
using namespace std;

string partNumber{};
string partName{};
int partCost{};
int howMany{};
int main()
{
    Invoice invoice1{"12345", "Hammer", 10, 5};

   cout << "Part Number: " << invoice1.getNum() << endl;
   cout << "Part Description: " << invoice1.getDescrip() << endl;
   cout << "Price per part: " << invoice1.getPrice() << endl;
   cout << "Quantity: " << invoice1.getQuantity() << endl;
   cout << "Invoice Total: " << invoice1.getInvoiceAmount() << endl;

   cout << "Please enter a part number: " << endl;
   getline (cin, partNumber);
   invoice1.setNum(partNumber);
   invoice1.getNum();

   cout << "Please enter a part description: " << endl;
   getline (cin, partName);
   invoice1.setDescrip(partName);
   invoice1.getDescrip();

   cout << "Please enter a price per item: " << endl;
   cin >> partCost;
   invoice1.setPrice(partCost);
   invoice1.getPrice();

   cout << "Please enter the number of parts: " << endl;
   cin >> howMany;
   invoice1.setQuantity(howMany);
   invoice1.getQuantity();
   invoice1.getInvoiceAmount();

   cout << "New Part Number: " << invoice1.getNum() << endl;
   cout << "New Part Description: " << invoice1.getDescrip() << endl;
   cout << "New Price per part: " << invoice1.getPrice() << endl;
   cout << "New Quantity: " << invoice1.getQuantity() << endl;
   cout << "New Invoice Total: " << invoice1.getInvoiceAmount() << endl;

   return 0;
}



//Exercise 3.11 header file
class Employee {
public:
    Employee(std::string name1, std::string name2, int earnings)
        :firstName{name1}, lastName{name2} {
            if (earnings > 0)
                monthSalary = earnings;
            else monthSalary = 0;
        }

    std::string getFirstName() const {
        return firstName;}

    std::string getLastName() const {
        return lastName;}

    int getYearSalary() const {
        return monthSalary*12;}

    void raise() {
        monthSalary *= 1.1;
    }

private:
    std::string firstName;
    std::string lastName;
    int monthSalary;

};


//Exercise 3.11 main file
#include <iostream>
#include <string>
#include "Employee.h"
using namespace std;

int main()
{

    Employee employee1{"Jim", "Halpert", 5000};
    Employee employee2{"Dwight", "Schrute", 4000};

    cout << "Employee 1 Name: " << employee1.getFirstName() << " " << employee1.getLastName() << endl;
    cout << "Employee 1 Yearly Salary: " << employee1.getYearSalary() << "\n" << endl;
    cout << "Employee 2 Name: " << employee2.getFirstName() << " " << employee2.getLastName() << endl;
    cout << "Employee 2 Yearly Salary: " << employee2.getYearSalary() << endl;

    cout << "\nEmployees are given a 10% raise" << endl;
    employee1.raise();
    employee2.raise();

    cout << "\nEmployee 1 Name: " << employee1.getFirstName() << " " << employee1.getLastName() << endl;
    cout << "Employee 1 Yearly Salary with 10% raise: " << employee1.getYearSalary() << "\n" << endl;
    cout << "Employee 2 Name: " << employee2.getFirstName() << " " << employee2.getLastName() << endl;
    cout << "Employee 2 Yearly Salary with 10% raise: " << employee2.getYearSalary() << endl;

}


//Exercise 3.12 header file

class Date{

public:
    Date (int whatMonth, int whatDay, int whatYear)
        : day{whatDay}, year{whatYear} {
            if ( (0 < whatMonth) && (whatMonth <= 12) )
                month = whatMonth;
            else month = 1;
        }

    int getDay() const {
        return day;}

    void setDay(int whatDay) {
        day = whatDay;
    }

    int getMonth() const {
        return month;
    }

    void setMonth(int whatMonth) {
            if ( (0 < whatMonth) && (whatMonth <= 12) )
                month = whatMonth;
            else month = 1;
    }

    int getYear() const {
        return year;
    }

    void setYear(int whatYear) {
        year = whatYear;
    }

    void displayDate() {
        std::cout << getMonth() << "/" << getDay() << "/" << getYear() << std::endl;
    }
private:
    int month;
    int day;
    int year;
};



//Exercise 3.12 main file


#include <iostream>
#include <string>
#include "Date.h"
using namespace std;

int whatDay{};
int whatMonth{};
int whatYear{};
int main()
{
    Date theDate{1, 29, 2018};

    cout << "Initialized date: ";
    theDate.displayDate();

    cout << "set a new month:";
    cin >> whatMonth;
    theDate.setMonth(whatMonth);

    cout << "set a new day:";
    cin >> whatDay;
    theDate.setDay(whatDay);

    cout << "set a new year:";
    cin >> whatYear;
    theDate.setYear(whatYear);

    cout << "The new date is: ";
    theDate.displayDate();


}


//Exercise 3.13 - Removing duplicated code


// Fig. 3.9: AccountTest.cpp
// Displaying and updating Account balances.
#include <iostream>
#include "Account.h"

using namespace std;

void displayAccount (Account accountToDisplay) {
 cout << "Account: " << accountToDisplay.getName()
 << " balance is $" << accountToDisplay.getBalance() << endl;
 }

int main()
{
   Account account1{"Jane Green", 50};
   Account account2{"John Blue", -7};


   // display initial balance of each object
   displayAccount(account1);
   displayAccount(account2);

   cout << "\n\nEnter deposit amount for account1: "; // prompt
   int depositAmount;
   cin >> depositAmount; // obtain user input
   cout << "adding " << depositAmount << " to account1 balance";
   account1.deposit(depositAmount); // add to account1's balance

   // display balances
   displayAccount(account1);
   displayAccount(account2);

   cout << "\n\nEnter deposit amount for account2: "; // prompt
   cin >> depositAmount; // obtain user input
   cout << "adding " << depositAmount << " to account2 balance";
   account2.deposit(depositAmount); // add to account2 balance

   // display balances
   displayAccount(account1);
   displayAccount(account2);
}

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