CSCI 3155, Quiz 3
20 minutes

1. [6 points] Give an example that demonstrates the difference between
parameter passing by reference and parameter passing by value.  Your answer
should take the form of a code segment which if executed with
pass-by-reference would produce one answer and if executed with pass-by-value
would produce another answer.  Provide a brief explanation of why your code
produces different results with pass-by-value and pass-by-reference
























2. [4 points] C++ and Modula-3 provide both pass-by-value and
pass-by-reference.  Explain why these languages provide both modes rather than
just pass-by-value or pass-by-reference.