07-26-2011 12:01 AM
When i use TAL programing . If i use External to "source-in2 file" the program and i am using the call from some other "source- in1 file".
Whether two file are compiled separately and it can be binded through BIND utility.or we can compile only one file and we get the one object.
And what is the difference between the two object.
08-04-2011 06:30 PM
I don't know that I understand your question. EXTERNAL is a keyword that tells the TAL compiler that a procedure definition will be found either a link time or at runtime. For example, all the procedures in EXTDECS are marked EXTERNAL. In other words, EXTERNAL is equivalent to the C/C++ ";" after a function declarations. For example, these two are semantically equivalent:
-- TAL declaration
int foo (p1);
/* C declaration */
short FOO (short p1);
08-05-2011 09:01 PM
>these two are semantically equivalent:
Except it would be better to actually use extern keyword for the C case:
extern short FOO(short p1);
(And probably nobody would use short for C parms and returns. :-)