ICS 111 - September 23

You will need to know this for next week's labs, and for the rest of the class!  Please review at home and be sure that this makes sense to you.  Try making sample programs that use these, and email one of your TAs with questions if you have any.

Boolean variable with other variable types:

http://java.sun.com/docs/books/tutorial/java/nutsandbolts/variables.html

Relational and Conditional Operators:

http://java.sun.com/docs/books/tutorial/java/nutsandbolts/relational.html

If / Else statements:

http://java.sun.com/docs/books/tutorial/java/nutsandbolts/if.html

Class example:  You and a partner solve the following:

1.  Write pseudo-code to do the following:

• Ask the user for four grades (0-100, hopefully)
• parse the input for doubles (numbers)
  • if any of the numbers are below zero, print a message and exit
  • if any of the numbers are above 100, print a message and exit
  • if any of the numbers are not numbers, print a message and exit
• Average the grades and print the numerical average
• Using if / else if / else statement- print the letter grade of the average determined above
  • A = 90-100, B = 80-89, C = 70-79, D = 60-69, F = below 60

2.  Write Java code to do what your pseudocode specifies above

3.  Turn in your answer before leaving class.