C++ TUTORIAL FOR BEGINNERS: Program to compute for Total Monthly Income (Revenue), Expenses, and Net Income (Profit)

This C++ program is a simple basic addition and subtraction operation involving a typical household monthly salary, revenue, monthly bills and expenses and the total net profit. The user is required to enter the amounts and other information. If a field which requires a data to input does not apply to a given user, 0 (zero) should be entered. An output file called "income.txt" is generated by the program to reflect the values keyed in.

Sample data input:

income.txt file:

Source code:

/*
PROGRAM 6: Monthly Net Income
AUTHOR: eternaltreasures
DATE: 2010 September 18
*/


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

#define newline '\n'

int main ()
{

int year;
char month[10];

float Wages_Salary,
      Spouse_Child_support,
      Other_income;

float Food_Grocery,
      Mortgage_Rent,
      Transportation,
      Retirement,
      Insurance,
      Education,
      Children,
      Cable_Internet,
      Home_Cell_phone,
      Loans_Credit_cards,
      Laundry,
      Electricity,
      Gas_Heating,
      Water_bills,
      Personal,
      Clothing,
      Medical,
      Recreation,
      Donations_Gifts,
      Other_expenses;
     
float INCOME, 
      EXPENSES,
      NET_INCOME;
     
//Open the output file     
ofstream fout;    
fout.open ("income.txt");

//Welcome and instructions
cout << "Welcome to the Monthly Net Income report program!";
cout << newline;
cout << newline;
cout << "Pls. fill up all the data.";
cout << newline;
cout << "Enter 0 if not applicable.";
cout << newline;
cout << newline;

//Year and Month  
cout << "Year: "; cin >> year;
cout << "Month: "; cin >> month;
cout << newline;

//INCOME sources
cout << "MONTHLY INCOME:";
cout << newline;
cout << "Wages/Salary: "; cin >> Wages_Salary;  
cout << "Spouse/Child support: "; cin >> Spouse_Child_support;
cout << "Other income: "; cin >> Other_income;
cout << newline;

//ALL EXPENSES
cout << "MONTHLY EXPENSES:";
cout << newline;
cout << "Food/Grocery: "; cin >> Food_Grocery;
cout << "Mortgage/Rent: "; cin >> Mortgage_Rent;
cout << "Transportation: "; cin >> Transportation;
cout << "Retirement: "; cin >> Retirement;
cout << "Insurance: "; cin >> Insurance;
cout << "Education: "; cin >> Education;
cout << "Children: "; cin >> Children;
cout << "Cable/Internet: "; cin >> Cable_Internet;
cout << "Home/Cell phone: "; cin >> Home_Cell_phone;
cout << "Loans/Credit cards: "; cin >> Loans_Credit_cards;
cout << "Laundry: "; cin >> Laundry;
cout << "Electricity: "; cin >> Electricity;
cout << "Gas/Heating: "; cin >> Gas_Heating;
cout << "Water bills: "; cin >> Water_bills;
cout << "Personal: "; cin >> Personal;
cout << "Clothing: "; cin >> Clothing;
cout << "Medical: "; cin >> Medical;
cout << "Recreation: "; cin >> Recreation;
cout << "Donations/Gifts: "; cin >> Donations_Gifts;
cout << "Other expenses: ";  cin >> Other_expenses;

//Compute Total Income
INCOME = Wages_Salary
       + Spouse_Child_support
       + Other_income;

cout << newline;
cout << "TOTAL MONTHLY INCOME: " << INCOME;

//Compute Total Expenses
EXPENSES = Food_Grocery
         + Mortgage_Rent
         + Transportation
         + Retirement
         + Insurance
         + Education
         + Children
         + Cable_Internet
         + Home_Cell_phone
         + Loans_Credit_cards
         + Laundry
         + Electricity
         + Gas_Heating
         + Water_bills
         + Personal
         + Clothing
         + Medical
         + Recreation
         + Donations_Gifts
         + Other_expenses;

cout << newline;
cout << newline;
cout << "TOTAL MONTHLY EXPENSES: " << EXPENSES;

//Compute Net Income
NET_INCOME = INCOME - EXPENSES;

cout << newline;
cout << newline;
cout << "MONTHLY NET INCOME: " << NET_INCOME;
cout << newline;
cout << newline;

//Write to output file (income.txt)
fout << "Year: " << year;
fout << newline;
fout << "Month: " << month;
fout << newline;
fout << newline;

fout << "MONTHLY INCOME:";
fout << newline;
fout << "Wages/Salary: " << Wages_Salary;  
fout << newline;
fout << "Spouse/Child support: " << Spouse_Child_support;
fout << newline;
fout << "Other income: " << Other_income;
fout << newline;
fout << newline;

fout << "MONTHLY EXPENSES:";
fout << newline;
fout << "Food/Grocery: "  << Food_Grocery;
fout << newline;
fout << "Mortgage/Rent: " << Mortgage_Rent;
fout << newline;
fout << "Transportation: " << Transportation;
fout << newline;
fout << "Retirement: " << Retirement;
fout << newline;
fout << "Insurance: " << Insurance;
fout << newline;
fout << "Education: " << Education;
fout << newline;
fout << "Children: " << Children;
fout << newline;
fout << "Cable/Internet: " << Cable_Internet;
fout << newline;
fout << "Home/Cell phone: " << Home_Cell_phone;
fout << newline;
fout << "Loans/Credit cards: " << Loans_Credit_cards;
fout << newline;
fout << "Laundry: " << Laundry;
fout << newline;
fout << "Electricity: " << Electricity;
fout << newline;
fout << "Gas/Heating: " << Gas_Heating;
fout << newline;
fout << "Water bills: " << Water_bills;
fout << newline;
fout << "Personal: " << Personal;
fout << newline;
fout << "Clothing: " << Clothing;
fout << newline;
fout << "Medical: " << Medical;
fout << newline;
fout << "Recreation: " << Recreation;
fout << newline;
fout << "Donations/Gifts: " << Donations_Gifts;
fout << newline;
fout << "Other expenses: " << Other_expenses;
fout << newline;

fout << newline;
fout << "TOTAL MONTHLY INCOME: " << INCOME;

fout << newline;
fout << newline;
fout << "TOTAL MONTHLY EXPENSES: " << EXPENSES;

fout << newline;
fout << newline;
fout << "MONTHLY NET INCOME: " << NET_INCOME;
fout << newline;
fout << newline;

fout.close();

return 0;
}