CMSC104 Fall 2012
Programming Project 2
Bank Account
Out: Thursday, November 8
Due: Wednesday, November 21, before 11:59 p.m.
The Objective
This project is designed to give you practice working with switch statements and functions. It will also give you more practice working with while loops.
The Background
Most people store their money in a checking account. There are two basic operations performed on the checking account. One operation is to deposit money into the account and the other is to make a withdrawal from the account.
The Task
Your job is to write a program that will simulate the behavior of a checking account. Your program should accept a beginning balance from the user and then display a menu with four options. The menu should have the four options shown in the sample output below. The functions you will write, in addition to the main function, are:- void print_greeting (void); - This function prints an explanation of the program to the user. You should assume the user knows nothing about the program and give a detailed explanation.
- void print_menu (void); - This function displays the menu to the screen.
- float get_positive_value (void); - This function gets a positive (greater than 0) value from the user. It should error check the user input to make sure the value is greater than 0, and loop until the user enters a proper value. (We written this kind of loop many times during the term, so refer to old lecture slides.) It takes no arguments and returns the value entered by the user. You should use this function to get the beginning balance from the user. You should also use it to get the amount to withdraw or deposit.
- float withdrawal (float balance, float withdrawal_amt); - This function takes the current balance and the amount to withdraw. It returns the new balance after the withdrawal is made.
- float deposit (float balance, float deposit_amt); - This function takes the current balance and the amount to be deposited as arguments. It returns the new balance after the deposit is made.
- void print_receipt (int total_withdrawals, int total_deposits, float beg_balance, float balance); - This function prints an account summary to the screen. It should list the total number of withdrawals, the total number of deposits, the beginning balance and the ending balance. It does not have to match the sample output exactly.
More Details
- You must use the above function prototypes EXACTLY as they have been given to you. You may not change them in any way.
- You should also use symbolic constants (we'll discuss these in class
on Wednesday) for the
menu options in the switch statement:
#define WITHDRAWAL 1 #define DEPOSIT 2 #define SUMMARY 3 #define QUIT 4
- If the balance in the checking account goes below zero after making a withdrawal or deposit, you should print a message to the user stating that the balance is negative. You do not have to prevent the balance from going below zero, you should simply print a warning when it happens.
Hints
- Note that functions like
withdrawal()anddeposit()update the balance and return it. Recall that function parameters are local variables, so just updating thebalanceparameter variable inside these functions will not change the balance in the calling function. So, the function that calls withdrawal() and deposit() (probably main()) must take the return value and assign it back into the balance variable it is maintaining.
Sample Output
linux3[1]% gcc -ansi -Wall proj3.c
linux3[2]% a.out
[Your greeting goes here.]
Please enter the beginning balance: 1000.00
1) Make a Withdrawal
2) Make a Deposit
3) Display Account Summary
4) Quit
Selection: 1
Enter the amount to withdraw: 500.00
1) Make a Withdrawal
2) Make a Deposit
3) Display Account Summary
4) Quit
Selection: 1
Enter the amount to withdraw: 100.00
1) Make a Withdrawal
2) Make a Deposit
3) Display Account Summary
4) Quit
Selection: 3
----------------------------------------------------
Account Summary
Beginning balance: $1000.00
Ending balance: $400.00
Total number of withdrawals: 2
Total number of deposits: 0
----------------------------------------------------
1) Make a Withdrawal
2) Make a Deposit
3) Display Account Summary
4) Quit
Selection: 2
Enter the amount to deposit: 500.00
1) Make a Withdrawal
2) Make a Deposit
3) Display Account Summary
4) Quit
Selection: 3
----------------------------------------------------
Account Summary
Beginning balance: $1000.00
Ending balance: $900.00
Total number of withdrawals: 2
Total number of deposits: 1
----------------------------------------------------
1) Make a Withdrawal
2) Make a Deposit
3) Display Account Summary
4) Quit
Selection: 1
Enter the amount to withdraw: 1000.00
********* WARNING: You have a negative account balance *********
1) Make a Withdrawal
2) Make a Deposit
3) Display Account Summary
4) Quit
Selection: 3
----------------------------------------------------
Account Summary
Beginning balance: $1000.00
Ending balance: $-100.00
Total number of withdrawals: 3
Total number of deposits: 1
----------------------------------------------------
1) Make a Withdrawal
2) Make a Deposit
3) Display Account Summary
4) Quit
Selection: 4
linux3[3]%
Submitting the Program
Here is a sample submission command. Note that the project name starts with uppercase 'P'.