递归下降子程序 program -function_list function list -functionfunction list s function->FUNC identifier parameter_list statement void ParseFunction ( { MatchToken (T FUNC); ParseIdentifier(); MatchToken (T LPAREN); ParseParameterList () MatchToken (T RPAREN); Parsestatement () 7 递归下降子程序 program –> function_list function_list –> function function_list |  function –> FUNC identifier ( parameter_list ) statement void ParseFunction() { MatchToken(T_FUNC); ParseIdentifier(); MatchToken(T_LPAREN); ParseParameterList(); MatchToken(T_RPAREN); ParseStatement(); }