CS 1044 Homework 5 Key
Spring 1999

 Q  Ans Reason
 1    2   Valid indices run from 0 to the dimension - 1
 2    1   Just trace it
 3    4   1 would access index 10, which is invalid.
          2 would miss index 0.
          3 would miss index 0 and access index 10.
          5 would miss index 0 and access invalid indices 10 and 11.
 4    2   Just trace it (carefully)
 5    5   arr[3] would get the value 9.
 6    3   This prints the values at indices 4, 3, 2 and 1 in that order.
 7    5   1 works by starting at index 0 and adding 2 to the index each time.
          2 works by running i from 0 to 2499 but doubling it in the index calculation,
            so the indices run 0, 2, 4, etc.
          3 prints two times the value for each index from 0 to 2499.
 8    3   FillEm() initializes the arrays, so they must be passed by reference.
 9    3   Copy() stores values into arr1[], os it must be passed by reference.
10    4   Copy() does not need to modify arr2[], so it should be passed by constant 
          reference.
11    3   The array stores counters (ints) and it must be able to store a counter for
          each of 255 possible characters.
12    3   
13    2   You can't assign a string to a char array except at the point of declaration.
14    3   This one prints "Ben" three times.
15    5
16    1   The extraction stops at the first whitespace character (the space after "Now"),
          without removing it.  So the get() call will read the space.
17    2   The first call to get() here reads 4 characters ("Now "), so the second call
          to get will read the 'i'.
18    2   Foo() will find a mismatch at index 5 and return false.
19    1   Foo() is comparing Name1 to itself, so it will return true.
20    3   If the strings contain a mismatch at a valid index, Foo() will find that and
          return false.  If the strings are identical up through the last valid index,
          then Foo() will continue comparing characters past that location.