In Assignment 2, you will be asked to submit code traces for some of your assigned programs.

Here are some sample code traces for compare3.cpp, one of the Assignment 2 example programs. Line numbers refer to this line numbered copy of compare3.cpp.  (For info on how to generate a line-numbered copy, see the online tutorial for Assignment 2.)

In the code traces below, I have included entries for each variable only for lines on which a variable's value CHANGES. A single question mark indicates that a variable has been declared but not yet given a value. (Hence the variable has a garbage value at that point.) A double question mark indicates the result of an operation performed using a garbage value. A triple question indicates uncertainty as to whether an operation has even taken place, because of dependence on at least one previous operation involving a garbage value. "Test case" numbers refer to the list of test cases for compare3.cpp in the Assignment 2 tutorial.

Test case 1:   Inputs 9, 1, and 5:

Line       Variables                             Remarks
number
           number1  number2  number3  largest

  24          ?
  25                   ?
  26                            ?
  27          9        1        5
  28
  29
  30                                     ?
  31                                             Testing (number1 > number2)
  32                                     9
  33                                             Testing (number2 > number1)
  34
  35
  36
  37                                             Testing (number3 > largest)
  38

Test case 5:   Inputs 1, 5, and 9:

Line       Variables                             Remarks
number
           number1  number2  number3  largest

  24          ?
  25                   ?
  26                            ?
  27          1        5        9
  28
  29
  30                                     ?
  31                                             Testing (number1 > number2)
  32
  33                                             Testing (number2 > number1)
  34                                     5
  35
  36
  37                                             Testing (number3 > largest)
  38                                     9

Test case 6:   Inputs 5, 1, and 9:

Line       Variables                             Remarks
number
           number1  number2  number3  largest

  24          ?
  25                   ?
  26                            ?
  27          5        1        9
  28
  29
  30                                     ?
  31                                             Testing (number1 > number2)
  32                                     5
  33                                             Testing (number2 > number1)
  34
  35
  36
  37                                             Testing (number3 > largest)
  38                                     9

Test case 7:   Inputs 9, 9, and 5:

Line       Variables                             Remarks
number
           number1  number2  number3  largest

  24          ?
  25                   ?
  26                            ?
  27          9        9        5
  28
  29
  30                                     ?
  31                                             Testing (number1 > number2)
  32
  33                                             Testing (number2 > number1)
  34
  35
  36
  37                                             ?? Testing (number3 > largest)
  38                                    ???

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