CSC133 Introduction to CS Using C++
Lab 4

Part I

Tuition for students at MCC is based on the number of credits taken. It also depends on whether one is a Middlesex County resident or not. In this part of the lab you will write a program to calculate tuition. The rules for tuition charges are:

If you live in Middlesex County, the cost of attending MCC is $ 81.55 tuition per credit plus $ 24.50 fees per credit.

If you live outside of Middlesex County, the cost of attending MCC is $163.10 tuition per credit plus $ 51.00 fees per credit.

Your program will have the following input:

• residency (one character, either M (Middlesex County resident) or O (non resident)
• number of credits

Your program will print the following:

• your name, course and section number, and the lab number
• number of credits
• tuition
• fees
• total payment due

In writing your program, create the following functions:

• intro: this function will print your name, course and section number, and the lab number
• tuition: this function will compute and return the tuition cost. Parms for this function are the residency and the number of credits.
• fees: this function will compute and return the total fees. Parms for this function are the residency and the number of credits.
• main: this function will prompt the user for the input, call the other functions, calculate the total payment due, and print all output.

Part II

In this part of the lab you will write a program that will calculate the amount of income tax owed at the end of the year. The program will also print a message with the amount of the tax refund or the tax still owed.

During the year, income tax is withheld from each paycheck. At the end of the year, you must calculate the actual amount of income tax which you owe. If the amount withheld is greater than your actual income tax, then the IRS will send you a refund check. But if the amount withheld is less than your actual income tax, then you must send an additional payment to the IRS to cover the rest of your income tax.

There are several steps in the calculations required. The amount of tax owed depends on how much you earned, but also on how many dependents you claim (how many people you are responsible for supporting). You get an exemption (a portion of your income that is not taxable) which is based on the number of dependents you claim.

Your program will have the following input:

• total income for the year
• number of dependents
• amount of tax withheld from pay during the year

Your program will print the following:

• your name, course and section number, and the lab number
• taxable income
• number of dependents
• income tax owed
• amount refunded or amount still owed

To calculate the tax owed, first calculate the total exemption amount by multiplying the number of dependents by the personal exemption, which is 4000. Next calculate the taxable income by subtracting the total exemption amount from the total income. To calculate the income tax owed, multiply the taxable income by the tax rate. If the taxable income is between 0 and 29000, the tax rate is 15%. If the taxable income is between 29001 and 79000, the tax rate is 24%. If the taxable income is over 79000, the tax rate is 31%. (These are not the actual tax rates in effect at this time.)

It is possible that the amount of tax withheld is less than the income tax owed. In that case, you must send in an additional tax payment so that the additional payment and the amount of tax withheld is equal to the income tax owed. If this is the case, print a message saying that additional tax is owed, and include the amount owed in the message. Otherwise the taxpayer will receive a refund of the extra tax withheld. If this is the case, print a message saying that there will be a refund, and include the amount of the refund in the message.

In writing your program, create the following functions:

• intro: this function will print your name, course and section number, and the lab number
• totexempt: this function will calculate and return the total exemption amount. The parm is the number of dependents.
• taxincome: this function will calculate and return the taxable income. Parms are the total income and the total exemption amount.
• refundorpay: this function will determine whether the taxpayer will receive a refund or must pay additional tax. This function will also print the appropriate message, as described above. Parms are the income tax owed and the amount of tax withheld.
• main: this function will prompt the user for the input, call the other functions, and calculate the income tax owed.

I want you to use the following good programming practices for both of your programs:

• Make sure that you include comments in your program. There should be a comment section at the beginning of the program which includes your name, class and section number, lab number, and a brief description of the purpose of the program. There should be a comment before each function that describes the purpose of the function. One phrase or sentence should be enough for our functions.
• Use named constants.
• Use meaningful variable and constant names.
• Be careful about indentation. Remember that every statement inside a function should be indented two or three spaces, or one tab. Remember that any statements inside an if or else should be indented even more.

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