Introduction - If you have any usage issues, please Google them yourself
Northern compile operations courses, including source code, test procedures, and documentation. For PL/0 compiler expansion following modifications: (1) add a word: reserved word ELSE, FOR, TO, DOWNTO, RETURN operator+ =,- =,++,- in which the FOR, TO, DOWNTO, RETURN belong election do content. (2) modify the word: inequality# to < > (3) increase the conditional statement ELSE clause