#include <iostream>

int mult(int a, int b=1, int c=1);

int main(void )
{
  std::cout << "mult(1) = " << mult(1) << std::endl;
  std::cout << "mult(1,2) = " << mult(1,2) << std::endl;
  std::cout << "mult(1,2,3) = " << mult(1,2,3) << std::endl;

  return(0);
}

int mult(int a, int b, int c)
{
   return(a * b * c);
}