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kumarvis
Warnings : 1
New User
Joined: 31 Mar 2007
Posts: 14
Location: Chennai
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Hi,
I did xpeditor test on program. During testing I am not clear with the following statement.
THIS IS HOW THE BELOW VARIABLES ARE DEFINED.
WORKING STORAGE SECTION.
05 WS20-PRT-CNTER PIC S9(09) COMP VALUE +0.
05 WS20-STODAT-TOTAL-READ PIC S9(09) COMP VALUE +0.
COMPUTE WS20-PRT-CNTER
= 1
+ (WS20-STODAT-TOTAL-READ
- (WS20-STODAT-TOTAL-READ / 1000) * 1000)
END-COMPUTE
In xpeditor, it shows the value of WS20-PRT-CNTER after computation is 2. Can u explain how is this possible? |
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priyesh.agrawal
Senior Member
Joined: 28 Mar 2005
Posts: 1448
Location: Chicago, IL
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| Quote: |
| In xpeditor, it shows the value of WS20-PRT-CNTER after computation is 2. |
Are you sure ?
If not, put some displays before and after compute statement to check what your output variable gets. As your compute statement doesnt seem other than increament by 1. |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello,
Where is the WS20-STODAT-TOTAL-READ field incrememnted?
Before the "problem" calculation, the WS20-STODAT-TOTAL-READ field may have been incremented to 1 from the first record read. |
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kumarvis
Warnings : 1
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Joined: 31 Mar 2007
Posts: 14
Location: Chennai
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| This is for to give u the detailed explaination of the above comp-3 computation issue with screen shots mentioned in the attachment doc. |
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mmwife
Super Moderator
Joined: 30 May 2003
Posts: 1592
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The way I read the compute:
(WS20-STODAT-TOTAL-READ / 1000) * 1000) truncates to zero, so
WS20-PRT-CNTER = 1 + 1 - 0 = 2 |
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dick scherrer
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Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello,
If the result was not 2, that would be a surprise.
From your original post
| Code: |
COMPUTE WS20-PRT-CNTER
= 1
+ (WS20-STODAT-TOTAL-READ
- (WS20-STODAT-TOTAL-READ / 1000) * 1000)
END-COMPUTE
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and in your attachment, you provide
| Quote: |
Before coming to the below computation, WS20-STODAT-TOTAL-READ was
Incremented by 1.
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so, the calculation is as Jack said 1 + 1 - 0 = 2.
We're here if this is not clear  |
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kumarvis
Warnings : 1
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Joined: 31 Mar 2007
Posts: 14
Location: Chennai
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Hi,
Thanks for ur respoce. I do have another concern on this issue.
May I know under what circumstances does the
(WS20-STODAT-TOTAL-READ/1000) * 1000 = zero. |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello kumarvis,
With the code as it is written, i believe this
| Quote: |
| (WS20-STODAT-TOTAL-READ/1000) * 1000 |
will be zero until WS20-STODAT-TOTAL-READ becomes greater than 1000.
Rather than focus on this particular calculation, please explain the use of the WS20-PRT-CNTER? As coded, it will increase at an increasing rate as the number of records reaches each successive thousand.
If we understand what this accomplishes, we may be able to offer better suggestions. |
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monga
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Joined: 18 Apr 2006
Posts: 13
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WS20-STODAT-TOTAL-READ = 1
The code says
| Code: |
COMPUTE WS20-PRT-CNTER
= 1
+ (WS20-STODAT-TOTAL-READ
- (WS20-STODAT-TOTAL-READ / 1000) * 1000)
END-COMPUTE |
which is
| Code: |
| COMPUTE WS20-PRT-CNTER = 1 + ( 1 - (1/1000) * 1000) |
But as COMPUTE WS20-PRT-CNTER is declared as a COMP variable and not a COMP-3
the resultant 0.999 would be equivalent to 0
| Code: |
WS20-PRT-CNTER = 1 + ( 1 - (0) * 1000)
WS20-PRT-CNTER = 1 + ( 1 - 0)
WS20-PRT-CNTER = 2 |
I hope this would clear your doubts. Also let me know if my understanding is not correct here.
Thanks,
monga |
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monga
New User
Joined: 18 Apr 2006
Posts: 13
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| Just one correction - Read the resultant value as 0.001 (and not 0.999 as stated above) |
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agkshirsagar
Active Member
Joined: 27 Feb 2007
Posts: 691
Location: Earth
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Is is just me who got confused? 
WS20-STODAT-TOTAL-READ and WS20-PRT-CNTER both are +0.
why you guys are taking 1 at WS20-STODAT-TOTAL-READ 
| Quote: |
| COMPUTE WS20-PRT-CNTER = 1 + ( 1 - (1/1000) * 1000) |
If i have learnt my fifth grade maths correct then answer should be 1.
Because of Dick's comment, I even gave it a try.
Surprise! I am correct! answer is 1  |
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muthuvel
Active User
Joined: 29 Nov 2005
Posts: 217
Location: Canada
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Folks,
I guess it is turning from a Mainframe Forum to Maths Forum |
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agkshirsagar
Active Member
Joined: 27 Feb 2007
Posts: 691
Location: Earth
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Sorry Folks!
I missed reading the attachment! Till then 'original post' was my Bible.
The attachement enlightened me about incrementing value.
But my maths is good! |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hi Abhijit,
As has been said, "Sometimes you get the bear, sometimes the bear gets you"
Now, if kumarvis comes back with more info, we may be able to offer some suggestions. . . |
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