Programming Assignment 03

Due: Week of Sep. 12 in lab

1. Problem: Write a java program to help teach multiplication to children. Generate two random numbers a and b between 0 and 10. Prompt the user for the answer to a*b. Report whether their answer is correct. Name the file and program ch1sec3prob00.java. Worth 20pts. Use standard input to get the integers from the user. Assume the user provides valid input.
   Examples:

   • Input:	$ java ch1sec3prob00
     Output:	(user will enter the value after the question...)
     	What is 5*6? 10 That is incorrect. The correct answer is 30.

   • Input:	$ java ch1sec3prob00
     Output:	(user will enter the value after the question...)
     	What is 6*6? 36 That is correct.

2. Problem 1.3.5 on page 77 of your book. Name the file and program ch1sec3prob05.java. Worth 20pts. Output good error messages for incorrect input values and not providing the correct amount of inputs to the program; output a single value otherwise. You do not need to handle NumberFormatExceptions.
   Examples:

   • Input:	$ java ch1sec3prob05 30 10
     Output:	21.24829325564962

   • Input:	$ java ch1sec3prob05 30
     Output:	Error you did not give only temperature and wind speed.

   • Input:	$ java ch1sec3prob05 60 2
     Output:	Error input was invalid. Temperature should be between -50 and 50. Windspeed should be between 3 and 120.

3. Problem 1.3.28 on page 81 of your book. Name the file and program ch1sec3prob28.java. Worth 40pts. Input from the command line and Output a single number. Hint: This code requires a loop.
   Examples:

   • Input:	$ java ch1sec3prob28 48 18
     Output:	6

   • Input:	$ java ch1sec3prob28 18 48
     Output:	6

4. Problem 1.3.30 on page 81 of your book. Name the file and program ch1sec3prob30.java. Worth 20pts. Output a list of numbers each on their own line as described. Do not use Math.pow, it is not appropriate for integers, as doubles represent a different range of values inaccurately. Hint: Stop your loop 1 iteration early to avoid "integer overflow".
   Examples:

   • Input:	$ java ch1sec3prob30 42
     Output:
     	1 42 1764 74088 3111696 130691232 5489031744 230539333248 9682651996416 406671383849472 17080198121677824 717368321110468608

5. Bonus. Write a bank account tracker that starts with $0 in the bank account. Prompt the user to alter their account (positive numbers will be deposits and negative numbers are withdrawals/charges). If they enter 0, quit the program. Worth 20pts. Display all money values nicely. Your program must handle incorrect input as well. Name your file and program ch1sec3bonus.java. Use standard input to get the alterations from the user.
   Examples:

   • Input:	$ java ch1sec3bonus
     Output:	(user will enter the value after the questions...)
     	Your account has $0.00. Enter a positive value for a deposit and a negative value for a withdrawal: 23 Your account has $23.00. Enter a positive value for a deposit and a negative value for a withdrawal: -5 Your account has $18.00. Enter a positive value for a deposit and a negative value for a withdrawal: -5h Error please enter a valid deposit/withdrawal: 0