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- PROGRAM FILE 18: THE IF-THEN STATEMENT WITH STRING OPERANDS.
- ANSI STANDARD 10.2, 10.4
-
- SECTION 18.1: THE IF-THEN STATEMENT WITH STRING OPERANDS.
-
- THIS SECTION TESTS THE COMPARISON OF STRING VARIABLES AND
- CONSTANTS WITH A VARIETY OF VALUES. BOTH RELATIONSHIPS
- (= AND <>) ARE TESTED FOR EACH PAIR OF VALUES. THE 'V' OR
- 'C' FOLLOWING THE COMPARAND VALUE INDICATES WHETHER IT IS
- A VARIABLE OR A CONSTANTS.
-
- 'T' OR 'F' IS PRINTED TO SHOW THE OUTCOME OF THE
- COMPARISON. FOR INCORRECT COMPARES, AN '*' IS PRINTED
- NEXT TO THE ERRONEOUS RESULT. WHEN DISPLAYING COMPARAND
- VALUES, THE UNDERLINE CHARACTER, '_', IS USED TO REPRESENT
- THE SPACE CHARACTER (THUS A DISPLAYED 'ONE_BLANK'
- INDICATES AN INTERNAL VALUE OF 'ONE BLANK').
- ALSO, THE NULL STRING (LENGTH OF ZERO) IS DENOTED BY THE
- LABEL '(NULL STRING)'.
-
- CHARACTER STRINGS SHOULD TEST EQUAL IF AND ONLY IF THE
- STRINGS ARE EQUAL IN LENGTH AND CONTAIN IDENTICAL SEQUENCES
- OF CHARACTERS.
-
- BEGIN TEST.
-
- LEFT : RIGHT
- COMPARAND V/C: COMPARAND V/C = <> RESULT
-
- ABC C : __ABC V F T OK
- ABC C : ABC V T F OK
- ABC C : ABC_ V F T OK
- ABC C : ___ABC__ V F T OK
- ABC C : (NULL STRING) V F T OK
- ABC C : ABCD V F T OK
- ___0X9 V : _0X9__ C F T OK
- 0X9 V : _0X9__ C F T OK
- 0X9__ V : _0X9__ C F T OK
- _0X9__ V : _0X9__ C T F OK
- __ V : ____ V F T OK
- _ V : (NULL STRING) V F T OK
- 18_CHARACTERS_LONG V : 18_CHARACTERS_LONG V T F OK
- 18_CHARACTERS_LONG V : 18_CHARACTERS_LONK V F T OK
- !#$%&'()0=+*<>? V : !#$%&'()0=+*<>? V T F OK
- (NULL STRING) V : (NULL STRING) V T F OK
- UVWXYZ_ V : UVWXYZ__ V F T OK
-
- *** TEST PASSED ***
-
- END TEST.
-
- END PROGRAM 18
-
- Program interrupted at line 1940
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