Introduction:

We chose the budget tracker as a project for the CS214 Data Structure lab course, which aims to provide a tool for students to manage their income and expenses. The program should offer basic and important functionalities for tracking income, categorizing expenses, and calculating the budget.

Requirements:

1. Inputs:

   • Income: Users will first enter their monthly salary, and after that, they can add any additional income to their budget along with the category of income.
   • Expense: Users will be able to enter expenses with their categories and amounts to track all transactions.
   • Income/Expense ID: Users can modify any transaction by entering its ID to change the amount, category, or type.

2. Outputs:

   • Summary: The program will show the summary of all transactions in a well-formatted way with the following information:
     • Total Income
     • Total Expense
     • Current balance (Total Income – Total Expense) showing ID and category of each Income and expense
   • Warnings: If the budget reaches a limit of $200, a message will appear to the user.
   • Error handling: The program will also have basic error handling for invalid inputs and prompt the user to re-enter the correct input.

Functionalities:

1. Main Menu:

   • The program will display a menu offering the following options:
     • Enter Income
     • Enter Expense
     • Delete Last Expense or Income
     • Modify a selected expense or income
     • Print summary
     • Exit

2. Enter Expense or Income:

   • The program will store the income or expense details inside a linked list.

3. View Summary:

   • This function will calculate the total balance and list all income and expenses.

4. Modify Income or Expense:

   • This method will offer the ability to change any existing transaction to modify the amount, category, or type by entering the ID.

5. Delete Last Income or Expense:

   • This method will allow the user to undo their last action, such as entering a new income or expense, by deleting it from the linked list.

6. Enter Salary:

   • The first thing the user will do is enter their monthly salary.

7. Exit:

   • If the user wishes to terminate the program, they can do so by choosing the exit option from the menu.