编译原理大作业暂存

#include"scanner.h"

typedef double(*FuncPtr)(double);
//语法树的节点
struct ExprNode                  //type of syntax tree's node
{
    enum Token_Type OpCode;       //PLUS MINUS DIV POWER FUNC CONST_ID
    union
    {
        struct{ExprNode *Left,*Right;}CaseOperator;
        struct{ExprNode *Child;FuncPtr MathFuncPtr;}CaseFunc;
        double CaseConst;
        double * CaseParmPtr;
    }Content;
};

extern void Parser(char *SrcFilePtr);//参数为字符串

parser.h