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kingofmainframes
Warnings : 2
New User
Joined: 09 Apr 2006
Posts: 20
Location: Chennai
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I have declared two variables like this.
77 A PIC 9(4).
77 B PIC X(6).
I am moving the following values.
MOVE 9999 TO A.
MOVE 9999 TO B.
IF A = B
DISPLAY 'TRUE'
ELSE
DISPLAY 'FALSE'
END-IF
What will be displayed after executing the IF-LOOP?  |
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martin9
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Joined: 01 Mar 2006
Posts: 290
Location: Basel, Switzerland
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hy kingofmainframes,
TRUE
martin9 |
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stalin.i@gmail.com
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Joined: 18 Apr 2005
Posts: 8
Location: chennai
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Hi King,
TRUE |
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kingofmainframes
Warnings : 2
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Joined: 09 Apr 2006
Posts: 20
Location: Chennai
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Hello Martin , Stalin
Do you notice field B is defined with X(6) so it will effectively contain two blanks at end. whereas A will contain only "9999" ?
A = "9999"
B = "9999 " |
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martin9
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Joined: 01 Mar 2006
Posts: 290
Location: Basel, Switzerland
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hy kingofmainframes,
hex value is x'F9F9F9F9' for A
and x'F9F9F9F94040' for B.
therefore A is only 4 bytes,
testing will end after fourth byte.
but why do you test this not yourself?
with a simple program you can test all
field comparisons very easily....
martin9  |
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DavidatK
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Joined: 22 Nov 2005
Posts: 700
Location: Troy, Michigan USA
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kingofmainframes,
To be correct. With cobol option OPTIMIZE(STD), the generated code is:
MOVE 9999 TO A.
MOVE 9999 TO B.
DISPLAY 'TRUE'
The compiler doesn't generate the "IF" test. The only possable condition is "TRUE" so thats what it generates.
martin9,
If your post is correct then.
| Quote: |
77 A PIC 9(4).
77 B PIC X(6).
I am moving the following values.
MOVE 9999 TO A.
MOVE 99999 TO B.
IF A = B
DISPLAY 'TRUE'
ELSE
DISPLAY 'FALSE'
END-IF |
would test "TRUE" , but it tests "FALSE" |
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kingofmainframes
Warnings : 2
New User
Joined: 09 Apr 2006
Posts: 20
Location: Chennai
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Martin,
Thanks for your response. will get back to you soon.
DavidatK,
I got your point. Still why would the compiler option OPTIMIZE(STD) generate such a code?.
MOVE 9999 TO A.
MOVE 9999 TO B.
DISPLAY 'TRUE'
ok. In case if I code the program as follows, what will be the outcome of the test.
I have declared two variables like this.
77 A PIC 9(4).
77 B PIC X(6).
01 FILE01-REC
02 C PIC 9(4) COMP-3.
02 D PIC 9(6) COMP-3.
I am moving the following values.
READ FILE01 INTO FILE01-REC.
MOVE C TO A.
MOVE D TO B.
IF A = B
DISPLAY 'TRUE'
ELSE
DISPLAY 'FALSE'
END-IF
Assume C and D has 9999 as value. |
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