semantics.h

为简单的函数绘图语言编写一个解释器语法制导部分 语法制导注意：必须严格按照下面步骤调试程序

//----------------------------semantics.h----------------------------------------
#ifdef _VC_COMPILER
	#include <windows.h>
	#include <windows.h>
	#include <wingdi.h>
	extern HDC hDC;
#endif;

#include "parser.h"

#ifdef _VC_COMPILER
	#define red RGB(255,0,0)
	#define black RGB(0,0,0)
#endif;



//-----------------------------------外部函数声明
extern void		DrawPixel(unsigned long x,unsigned long y);
extern double	GetExprValue(struct ExprNode * root);
extern void		DrawLoop(double Start,
						 double End,
						 double Step,
						 struct ExprNode * HorPtr,
						 struct ExprNode * VerPtr);
extern void		DelExprTree(struct ExprNode * root);