Default values on arguments in C functions and function overloading in C

Question

Converting a C++ lib to ANSI C and it seems like though ANSI C doesn\'t support default values for function variables or am I mistaken? What I want is something like

Answer 1

Try this.

#include 
#include 

/* print all non-negative args one at a time;
   all args are assumed to be of int type */
void printargs(int arg1, ...)
{
  va_list ap;
  int i;

  va_start(ap, arg1); 
  for (i = arg1; i >= 0; i = va_arg(ap, int))
    printf("%d ", i);
  va_end(ap);
  putchar('\n');
}

int main(void)
{
   printargs(5, 2, 14, 84, 97, 15, 24, 48, -1);
   printargs(84, 51, -1);
   printargs(-1);
   printargs(1, -1);
   return

 0;
}