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Candy
Joined: 09 Dec 2005
Posts: 17
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| Posted: Wed Jan 04, 2006 11:49 am Post subject: Need explanation ENTRY declaration |
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Hi Guys,
Can anyone explaing me in detail about the usage of ENTRY declaration in PL/1.
Rgds,
Candy |
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sairam
Joined: 30 Aug 2005
Posts: 58
Location: Kolkata
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| Posted: Thu Jan 05, 2006 3:54 pm Post subject: |
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Whenever you are using an external procedure in your program you have to declare the external procedure as entry.For example i am using the procedure XCLB008 in my main procedure and i first declare it like below
DCL XCLB008 ENTRY(CHAR(1),CHAR(*)) RETURNS(CHAR(32767) VAR);
dcl var1,var2 char(10)
then in the main procedure i am calling this as follows[/size]
var1='10-10-2005';
var2=XCLB008('7',var1);and the external procedure should be compiled first and then the main procedure. |
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shinjini_t
Joined: 11 May 2005
Posts: 14
Location: Bangalore, India
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| Posted: Sat Feb 04, 2006 1:02 pm Post subject: Re: Need explanation ENTRY declaration |
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ENTRY basically asks the compiler to generate code to convert the ARGUMENTS to make them compatible with the PARAMETERS in the called program.
Example, this is a code snippet from my main program:
DCL CALL_PGM ENTRY (FIXED DEC(5,2),FIXED DEC(5,2)) RETURNS (FIXED DEC(7,2))
This means that the main pgm calls the CALL_PGM and passes 2 FIXED DEC(5,2) to it and gets a FIXED DEC(7,2) in return from it.
All for the compatibility of the ARGUMENTS which the main pgm passes and the PARAMETERS which the called program recieves in.
Shinjini |
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