Thread: 'void' in function argument

I'm used to C++ and I just started to use C and I'm not sure if it is neccessary or just recommended to add 'void' in a empty parameter list in a function.

Is that bad?

Alright. Thanks for the reply.

Originally Posted by laserlight

When you are defining a function, the void parameter is unnecessary. If you are declaring a function (prototype), the void parameter means that the function takes no arguments. If you leave out the void, then the number of arguments that the function can take is left unspecified.

Is that true for C++ also?
I'm pretty sure func() means func( void ) in C++, but I don't have the standard memorized...

Originally Posted by matsp

No, in C++, a function with no arguments or using void is the same thing. C++ functions that take variable number of arguments must use "..." notation.

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Mats

Good. At least I got that much right.

I almost always declare a function with no arguments as func( void ) as well as I always write return( something ). (with brackets)

Call me old fashioned, but imho it's a question of continuity and clearness.

Originally Posted by EOP

I almost always declare a function with no arguments as func( void ) as well as I always write return( something ). (with brackets)

Call me old fashioned, but imho it's a question of continuity and clearness.

But return is a keyword, not a function. Why make it look like a function?

The only time I use parentheses around the return value is if I'm returning the result of an expression, like:

Code:

return (a < b);

Originally Posted by anon

But it is not needed there either...

Another thing, do you use brackets for the case statement too?

Code:

switch (n) {
    case (FIRST_OPTION)
...

Caught.
Probably I'm just used to it from my first encounter with C in the 80s.

And I'm a fan of brackets as (imho) they make code much more readable if you just scan it.

I use ( ) for the return statement because it resembles a function to me.

I don't use ( ) for case because case looks like a label to me.

Just a personal preference unless someone can explain why it is bad.