// Ex5_11.cpp
// Handling a variable number of arguments
#include <iostream>
#include <cstdarg>
using std::cout;
using std::endl;

int sum(int count, ...)
{
  if(count <= 0)
    return 0;

  va_list arg_ptr;                     // Declare argument list pointer
  va_start(arg_ptr, count);            // Set arg_ptr to 1st optional argument

  int sum(0);
  for(int i = 0 ; i<count ; i++)
    sum += va_arg(arg_ptr, int);  // Add int value from arg_ptr and increment

  va_end(arg_ptr);                     // Reset the pointer to null
  return sum;
}

int main(int argc, char* argv[])
{
  cout << sum(6, 2, 4, 6, 8, 10, 12) << endl;
  cout << sum(9, 11, 22, 33, 44, 55, 66, 77, 66, 99) << endl;
  return 0;
}