How does defining function variables before { and after function declaration work?

Asked May 10 '13 at 18:20

Active May 10 '13 at 19:18

Viewed 40 times

I have been looking at some documentation for my C projects and came across a peculiar type of function declaration. Here is an example:

function_name(arg1, arg2)
      int arg1;
      char *arg2
{
 //function code
....

How does this differ from normal:

function_name(int arg1, char *arg2){

And witch one is better to use at certain cituations?

edited May 10 '13 at 19:18

sepp2k

asked May 10 '13 at 18:20

PovilasID

The former isn't standard C. You were probably reading a book from the 1950s. Time to update your library? :-) – Kerrek SB May 10 '13 at 18:22
1

Urk. That's a so-called old-style function definition. You don't want to know about it. – Daniel Fischer May 10 '13 at 18:22
It is K & R format of function definition, it is not approved by the standard. – Alok Save May 10 '13 at 18:23
@AlokSave I found an example of it where apple is using it : http://www.opensource.apple.com/source/system_cmds/system_cmds-433.1/sysctl.tproj/pathconf.c – PovilasID May 10 '13 at 18:25
2

@PovilasSid - just cause apple does something doesn't make it right. – Mike May 10 '13 at 18:36

0 Answers0