Comp 110L

Lab Project #3

Due: 9/9/2009

1. Write a Java program to compute the average test score for the students in a class. Assume that there are seven (7) students who took the test and that the test scores are whole numbers between 0 and 100. Your program must read in the seven scores, compute the average and print out the result.

2. Write a program that reads in the amount of a monthly mortgage payment and the outstanding balance (i.e., the amount still owed) and then outputs the amount of the payment that goes to interest and the amount that goes to principal (i.e., the amount that goes to reducing the debt.) Assume that the annual interest rate is 5.49 percent. Use a defined constant for the interest rate. Note that payments are made monthly, so the interest is only one-twelfth of the annual interest of 5.49 percent.

3. Write a program that converts degrees Celsius to Fahrenheit (just a whole number) of degrees, without a fractional part), and then let the program print out the equivalent Celsius temperature, including the fractional part to at least one decimal point. A possible dialog might be

Enter a temperature in degrees Fahrenheit: 72

72 degrees Fahrenheit = 22.2 degrees Celsius.

For each of the above problems be sure to do the following:

1. Plan your solution by writing down the algorithm to solve the problem before you write the code.

2. Make sure your programs are self-documented including an appropriate comment header block.

3. Test the programs by running at least three test cases on each.

For each problem, turn in the algorithm design, a listing of the program, and a listing of the output from running the test cases.