constdef.cpp

PL/0语言的词法分析

#include "ConstDef.h"

char ch;				// last character read
int  sym;				// last symbol read
char id[MAXNUMLEN + 1];	// last identifier read
int  num;				// last number read

int  cc = 0;				// character count
int  cch;					// character head count 
int  ll = 0;				// line length
int  ln = 0;				// line number

int  kk;
int  err;
int  cx;				// index of current instruction to be generated.
int  level = 0;
int  tx = 0;

char line[1024];		// line buffer

FILE* infile=NULL, *outfile=NULL;