Question 1
----------
Why do you think it is important to develop a set of test inputs so
that every part of a program is executed at least once?




Question 2
----------
Enter all of the code here for the restructured version of nand.cpp,
which contains just one if and one lese statement.





Question 3
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For each of the following inputs, run nand.cpp and report the result.
(hint: all answers are either 0 or 1)


Input:    p=0, q=0
Result:


Input:    p=0, q=1
Result:


Input:    p=1, q=0
Result:


Input:    p=1, q=1
Result:



Question 4
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Consider the program nested.cpp.  For each of the following possible
outputs, give a sequence of three input values which would cause the
given output to occur.


Output:         "1"
Input sequence: 

Output:         "2"
Input sequence: 

Output:         "3"
Input sequence: 

Output:         "4"
Input sequence: 

Output:         "5"
Input sequence: