static int check_digits ( int n ) {
  while ( n != 0 ) {
    if ( ( n % 10 ) % 2 != 0 ) return 0 ;
    n /= 10 ;
  }
  return 1 ;
}

static int check_digits ( int n ) { while ( n != 0 ) { if ( ( n % 10 ) % 2 != 0 ) return 0 ; n /= 10 ; } return 1 ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (return_statement (decimal_integer_literal))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))) (return_statement (decimal_integer_literal))))