static int convert0To5Rec ( int num ) {
  if ( num == 0 ) return 0 ;
  int digit = num % 10 ;
  if ( digit == 0 ) digit = 5 ;
  return convert0To5Rec ( num / 10 ) * 10 + digit ;
}

static int convert0To5Rec ( int num ) { if ( num == 0 ) return 0 ; int digit = num % 10 ; if ( digit == 0 ) digit = 5 ; return convert0To5Rec ( num / 10 ) * 10 + digit ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (return_statement (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal)))) (return_statement (binary_expression left: (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (decimal_integer_literal)) right: (identifier)))))