Which function header do you prefer?

[istillshine@gmail.com]

int foo(x, y, z)
double *x;
int y;
double z;
{
/* do something */
}

or

int foo(double *x, int y, double z)
{
/* do something */
}


I notice the first one appeared in 1978's The C Programming Language
book.
The second edition of the book adopted the second one. The first one
seem more
readable when there are many arguments.

[Hallvard B Furuseth]

Re: Which function header do you prefer?

istillshine@gma il.com writes:

int foo(x, y, z)
double *x;
int y;
double z;
{
/* do something */
}
>
or
>
int foo(double *x, int y, double z)
{
/* do something */
}
>
>
I notice the first one appeared in 1978's The C Programming Language
book.

The 2nd form is called a prototype, and makes the compiler do type
checking on the arguments and convert them to the types of the parameter
if needed. E.g.
int foo(x) long x; {...}
... foo(3); ...
is wrong, it should have been foo(3L). But foo(3) is correct if
you used a prototype: int foo(long x);'.

The second edition of the book adopted the second one. The first one
seem more readable when there are many arguments.

Then write the 2nd like this:
int foo(
double *x,
int y,
double z)

--
Hallvard