title: Program Calculate Area Octagon
signature: program_calculate_area_octagon <- function(side) {
source_py: def program_calculate_area_octagon(side):
      return (((2 * (1 + math.sqrt(2))) * side) * side)
source_cpp: double program_calculate_area_octagon(double side) {
    return ( float ) ( 2 * ( 1 + sqrt ( 2 ) ) * side * side );
  }