1. Data Structures and Algorithms
The Case Logic
Structure
@ The case logic structure is made up of several or
many sets of instructions, only one of which will
be selected by the user and executed by the
programmer.
@ The form of the case logic structure is the
following:
CASE OF VARIABLE
= constant 1:
actions for VARIABLE = constant 1
= constant 2:
actions for VARIABLE = constant 2
= constant 3:
actions for VARIABLE = constant 3
.
.
OTHERWISE
actions for VARIABLE = anything
else
END-OF-CASE
Problem Solving with the Case Logic Structure *Property of STI
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2. Data Structures and Algorithms
The Case Logic
Structure
Flowchart Diagram for the Case Logic Structure
A
CASE OF
VARIABLE
= Constant 1 = Constant 2 = Constant 3 OTHERWISE
INSTRUCTIONS INSTRUCTIONS INSTRUCTIONS INSTRUCTIONS
B
Problem Solving with the Case Logic Structure *Property of STI
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3. Data Structures and Algorithms
The Case Logic
Structure
A
C1 = Constant 1
F T
C2 = Constant 2 IF V = C1
C3 = Constant 3
F T
IF V = C2
C4 = Constant 4 INSTRUCTIONS
FOR v = C1
F T
IF V = C3
INSTRUCTIONS
FOR v = C2
F T
IF V = C4
INSTRUCTIONS
FOR v = C3
INSTRUCTIONS INSTRUCTIONS
FOR v = C4 FOR v = C4
Codes B
@ Codes are characters, character strings, numbers, or
some combination of these types of data that a
programmer uses to name the options, the constants
in a case structure.
Problem Solving with the Case Logic Structure *Property of STI
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