How to count the number of arguments passed to a function that accepts a variable number of arguments?

Question

How to count the no of arguments passed to the function in following program:

#include
#include
void varfun(int i, ...);
int m         


        

Answer 1

Appending or NULL at the end makes it possible for me to have any number of arguments and not worry about it going out of the stack

#include 
template
inline void variadic_fun1(_Ty param1,...)
{
    va_list arg1;
    //TO_DO

    va_end(arg1);
}
template 
void variadic_fun2(_Ty param1,...)
{
    va_list arg1;
    va_start(arg1, param1);
    variadic_fun1(param1, arg1, 0);
    va_end(arg1);
}