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A Typical First Programming Challenge: 
Extreme Difference of a Triple
Objectives
-  To make sure your are operationally competent 
at writing and running a Java program. 
 -  To provide you with a simple opportunity to 
compose a program of a few very simple constructs, 
including variable declarations, expressions 
involving int objects, message sends to the IO 
object, the assignment operator, and simple statement 
selection.
 
The Problem
Prompt the user to enter three integers.  Read 
the three integers.  Compute and print the 
difference between the largest and the smallest 
number read.  Do so in the context of the following 
restrictions:
-  Use only "pure if" statements of "pure 
ifelse" statements for selection. 
 -  Use only "simple tests" in the selection 
statements.