Compiler

我写的lex.l放在了/project里，其他东西是老师仓库照搬过来的

需要实现的error

Lexical error (error type A): there are undefined characters or tokens in the SPL program: int a = @;

identifiers starting with digits:
    int 1stPerson = 1;

Syntax error (error type B): missing closing symbol: fibonacci(10;

    fibonacci(int n){
        ...

missing semicolon:
    int a = 1