void func(p1,p2,p3,...?)

[a_fischetti]

Is it possible to create a C or C++ function with a variable number of parameters?

Many thanks for your help.
Antonio.

_______

[Franky Braem]

Yes you can. This is an example I found in the VC++ Help :

int average(int first, ...)
{
int count = 0;
int sum = 0;
int i = first;
va_list marker;

va_start(marker, first);
while(i != -1)
{
sum += i;
count++;
i = va_arg(marker, int);
}
return (sum ? (sum / count) : 0 );
}




Other examples are the c-routines printf, sprintf, ...

[Franky Braem]

Yes you can. This is an example I found in the VC++ Help :

int average(int first, ...)
{
int count = 0;
int sum = 0;
int i = first;
va_list marker;

va_start(marker, first);
while(i != -1)
{
sum += i;
count++;
i = va_arg(marker, int);
}
va_end(marker);
return (sum ? (sum / count) : 0 );
}




Other examples are the c-routines printf, sprintf, ...

[Paul McKenzie]

Yes. Most C or C++ textbooks explains this technique. Alternately, do a search on "varargs.h" to get a rundown on how this is done.

Regards,

Paul McKenzie

[Paul McKenzie]

You're forgetting the most important part: the header:

#include <varargs.h> for UNIX

#include <stdio.h>
#include <stdarg.h> for ANSI

Regards,

Paul McKenzie