天津理工大学编译原理实验一

实验报告学院（系）名称：计算机与通信工程学院

实验源代码和心得体会

#include

#include

#include

#define bufsize 1024

//关键字

#define INCLUDE 256

#define AUTO 257

#define BREAK 258

#define CASE 259

#define CHAR 260

#define CONST 261

#define CONTINUE 262

#define DEFAULT 263

#define DO 264

#define DOUBLE 265

#define ELSE 266

#define ENUM 267

#define EXTERN 268

#define FLOAT 269

#define FOR 270

#define GOTO 271

#define IF 272

#define INT 273

#define LONG 274

#define REGISTER 275

#define RETURN 276

#define SHORT 277

#define SIGNED 278

#define SIZEOF 279

#define STA TIC 280

#define STRUCT 281

#define SWITCH 282

#define TYPEDEF 283

#define UNION 284

#define UNSIGNED 285

#define VOLATILE 286

#define WHILE 287

//运算符

#define PLUS 288 // +

#define MINUS 289 // -

#define MUL 290 // * #define DIV 291 // /

#define REMAIN 292 // %

#define LESS 294 // <

#define EQUAL 295 // =

#define MISTAKE 296 // ! #define AND 297 // &

#define OR 298 // |

#define PP 299 // ++

#define MM 300 // --

#define EE 301 // ==

#define GE 302 // >=

#define LE 303 // <=

#define MISE 304 // !=

#define AA 305 // &&

#define OO 306 // ||

#define PE 307 // +=

#define MINUSE 308 // -=

#define MULE 309 // *=

#define DIVE 310 // /=

#define POW 311 // ^ // 界符

#define SEMIC 312 // ;

#define COMMA 313 // ,

#define MULANNO_L 314 // /* #define MULANNO_R 315 // */ #define BRACE_L 316 // { #define BRACE_R 317 // } #define BRAKET_L 318 // (

#define BRAKET_R 319 // )

#define MIDBRA_L 320 // [

#define MIDBRA_R 321 // ]

#define ONE_ANNO 322 // //

//标识符和常量符

#define TAG 400

#define CONINT 401

#define CONFLOAT 402

#define CONCHAR 403

#define CONSTRING 404

//转义字符和字符串

#define CA 500

#define CB 501

#define CF 502

#define CN 503

#define CR 504

#define CT 505

#define CV 506

#define CQUE 508

#define CDQM 509

#define CQM 510

#define ZERO 511

using namespace std;

typedef struct Variate{//变量标识符

int id;

char name[50];

}Variate;

typedef struct Constant{//常量

int id;

char name[50];

}Constant;

typedef struct Sign{

char name[100];

int sym;

char attr[100];

}Sign;

const char *keywordTable[]={"include","auto","break","case","char","const","continue",

"default","do","double","else","enum","extern","float","for",

"goto","if","int","long","register","return","short","signed",

"sizeof","static","struct","switch","typedef","union","unsigned",

"volatile","while","","##"};//##作用是判断是否结束

const char *operateTable[]={"+","-","*","/","%",">","<","=","!","&","|","++","--",

"==",">=","<=","!=","&&","||","+=","-=","*=","/=","^","##"}; const char *borderTable[]={";",",","/*","*/","{","}","(",")","[","]","//","##"};

const char changeList[12]={'a','b','f','n','r','t','v','\\','?','"','\'','0'};

FILE *in;

FILE *Out;

FILE *Error;

int line=1; //用于输出错误的行数或者其他情况。默认值是从1 开始，为第一行char buf[bufsize]; //存储读取的一行的字符串

char firchar; //头文件下第一个字符

char Char;

int start=0;

int VariateNum=0;//记录变量的个数，减去1

int ConstantNum=0;//记录常量的个数

int SignNum=0;//记录标记的个数

int notation=1;//记录是否找到多行注释的另一半*/ ,默认值是1 即为有另一半

int isNotation=0;//判断是否是在注释行内0 不是，1 单行注释2多行注释

bool last=false;

int late=0;

Variate var;

Constant con;