用以下Context Free Grammar(CFG) 编写一个简单的编译程序

<PROGRAM> → <STMTS>

<STMTS> → <STMTS> <STMT> | <STMT>

<STMT> → <ASSIGNMENT_STMT> | <IF_STMT> | <PRINT_STMT>

<ASSIGNMENT_STMT> → variable = integer ; | variable = <EXPRESSION> ;

<EXPRESSION> → <EXPRESSION> + <TERM> | <EXPRESSION> - <TERM> |
<TERM>

<TERM> → <TERM> * <FACTOR> | <TERM> / <FACTOR> | <FACTOR>

<FACTOR> → variable | ( <EXPRESSION> ) | integer

<IF_STMT> → if ( <CONDITION> ) then <STMTS> endif

<PRINT_STMT> → variable ;

<CONDITION> → <VALUE> <COND_OP> <VALUE>

<VALUE> → variable | integer

<COND_OP> → = | < | > | <= | >=

本人对如何将CFG 用C或C++表达不是很清楚, 希望可以得到大家的帮助, 谢谢.