Examples of Pseudocode, 12/30/2005
Examples of PseudoCode, 12/30/2005. R. Roggio
Reasonably Good examples of Pseudo Code. These were taken from COBOL courses more advanced than COP2120. But you can see the style and level of design.
Note that the pseudo code is reasonably language independent! This is VERY important.
We use words like LOOP … End Loop; Set, Increment, Initialize, and words that are not necessarily tied to an implementing language.
1. Another real good function; Indentation good. Level of detail good.
Note also the "generalization of the CASE statements."
This is how to do such a thing...
A few additional examples of pseudocode that is too vague.
Compute(parameters: pointer to array, pointer to stat struct, state counter)
Initialize counter to 0.
Loop while counter <= state counter -1
Switch to compute element based on its region number
Case New England Region
Increment total counter
Add state population to total population
Increment New England counter
Add state population to New England Total Population
End Case
Case Mid Atlantic Region
...... <Infer details from New England Case stmts.
End Case
Case South Region
......
End Case
Case Midwest Region
......
End Case
Case Southwest Region
......
End Case
Case West Region
......
End Case
End Switch
End Loop
Calculate average state population <== TOO VAGUE AGAIN. Show HOW!
If New England counter is > 0
Compute New England average population <== TOO VAGUE. How???
End If
If Mid Atlantic counter is > 0
Compute Mid Atlantic average population DITTO...
End If
If South counter is > 0
Compute South average population
End If
If Midwest counter is > 0
Compute Midwest average population
End If
Collapse these!
If Southwest counter is > 0 Add a comment, which
Compute Southwest average population would be sufficient.
End If
If West counter is > 0
Compute West average population
End If
end Compute
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2. See comments....
Excellent indentation. Good levels of abstraction. Only a couple
of problems...a couple of vague statements...
Good scope terminators
Sort_Array(parameters: pointer to temp struct, pointer to array, state counter)
Loop while A counter is <= state counter -1
Loop while B counter is <= A counter
Compare state abbreviation strings <= Vague... HOW to compare?
If element 2 string has a greater value than element 1 string
Copy element 1 into temp structure;
Copy element 2 into element 1's position in array
Copy temp structure into element 2's position in array
End If
End Loop
End Loop
Loop while A counter is <= state counter -1
Loop while B counter is <= A counter
Compare region number <== to what?
If element 2 has a greater region value than element 1
Copy element 1 into temp structure;
Copy element 2 into element 1's position in array
Copy temp structure into element 2's position in array
End If
End Loop
End Loop
end Sort_Array
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3. Another well done routine....
See one comment herein.
Output(parameters: pointer to array, pointer to state struct, state counter)
Set Number region to 1
Set region counter equal to first element in array's region number
Loop while variable <= state counter -1
If array element region number does not equal region counter
Increment Number region
Set region counter equal to current elements region number
End If
End Loop
Compute average regional population
Loop while header counter <= Number region
Switch to decide which header is to be printed
Case region number = 1
Print New England Header
End Case
Case region number = 2
Print Mid Atlantic Header
End Case
Case region number = 3
Print South Header
End Case
Case region number = 4
Print Midwest Header
End Case
Case region number = 5
Print Southwest Header
End Case
Case region number = 6
Print West Header
End Case
End Switch
While region number is = element region number
Print detail lines
End While
Switch to decide which summary to print
Case region number = 1
Print New England Summary WHAT IS INCLUDED IN THE
End Case SUMMARY??? (TELL ONE
TIME IN PSEUDOCODE.
Case region number = 2
Print Mid Atlantic Summary
End Case
Case region number = 3
Print South Summary
End Case
Case region number = 4
Print Midwest Summary
End Case
Case region number = 5
Print Southwest Summary
End Case
Case region number = 6
Print West Summary
End Case
End Switch
Advance screen with user input
End Loop
Print grand totals
end Output
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