Hello Indika,
If you can use function pointer for a function with 1 or 2 arguments, why do
you think you cannot use function pointer for function which takes multiple
arguements.
Please find sample test program which uses function pointer to a function
which takes multiple arguments.
I hope this will be of some help to you.Right I guess ???
I have verified it to be working on SOLARIS OS using gcc.
#include<stdio.h>
#include<stdarg.h>
void sum(char *str,int num_args, ...);
int main()
{
void (*fptr_var_arg)(char *str,int var ,... );
fptr_var_arg = sum;
sum("sum is %d\n",4,10,13,15,20);
return 0;
}
void sum(char *str,int num_args, ...)
{
va_list ptr;
int sum=0,i;
va_start(ptr,num_args);
for(i=0;i<num_args;i++)
sum += va_arg(ptr,int);
printf(str,sum);
va_end(ptr);
}
Thnx....Ram
On 12 Apr 2007 02:35:28 -0700, Chetan Nanda <[EMAIL PROTECTED]> wrote:
>
> I think in a function accepting variable number of arguments, there must
> be
> atleast one fixed argument that will be treadted as a start of variable
> argument list.
> Please correct me if i am wrong
>
> thank
> Chetan
>
> On 10 Apr 2007 23:52:00 -0700, Indika Bandara Udagedara <
> [EMAIL PROTECTED] <indikabandara19%40yahoo.com>> wrote:
> >
> > function pointer to variable argument function
> > hi,
> >
> > how can i define a function pointer type to a function that takes
> variable
> > number(0 or more) of arguments
> >
> > following does not work..??
> >
> > ////////////////////////////////////////////////////////////////////
> >
> > /* func ptr to function which takes 0 or more args */
> >
> > typedef void (*func_ptr)(...);
> >
> > /* functions that take 0,1 args */
> >
> > void foo();
> >
> > void foo1(int);
> >
> > /* assignment DOESN'T COMPILE */
> >
> > func_ptr pfoo = foo;
> >
> > func_ptr pfoo1 = foo1;
> >
> > gcc error:
> >
> > invalid conversion from `void (*)(int)' to `void (*)(...)'
> >
> > ///////////////////////////////////////////////////////////////////
> >
> > in essence, what i want is a function pointer which is capable of taking
> > any number of arguments.
> >
> > can somebody help me with this?
> >
> > indika
> >
> > ---------------------------------
> > Need Mail bonding?
> > Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users.
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
>
> [Non-text portions of this message have been removed]
>
>
>
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