《C语言词法分析器》开发文档及源代码

1、C语言词法分析器开发文档Powered By萌萌的玉雪、实验题目编制并调试c词法分析程序。、实验目的全面深入理解高级语言程序设计知识，掌握应用技巧，提高应用与分析能力。、主要函数void load ()void char search (ehar *word)void mai n ()void in tb seareh(ehar *word)void sea n ()void e seareh(ehar *word)void in ta seareh(ehar *word)void ee seareh(ehar *word)四、设计void mai n ()1主函数2.初始化函数 void l

2、oad ()3保留字及标识符判断函数void char_search(char *word)4.整数类型判断函数void in ta_search(char *word)5.浮点类型判断函数void in tb_search(char *word)6.字符串常量判断函数void cc_search(char *word)7.字符常量判断函数void c_search(char *word)同4、5函数图8.主扫描函数void scan ()函数开始五、关键代码#i nclude #in elude #in elude char*keyO=，”auto,break,case,char,co ns

3、t,co nti nue,default,do,double,else,e num,extern,float,for,goto,if ,i nt,lo ng,register,return,short,sig ned,sizeof,static,struct,switch,typedef,_Complex,_lmagi nary, un io n,u nsig ned,void,volatile,while;/*保留字表*/char *key1=”;/*分隔符表*/char*key2=+ - * / % = = = != ! & |=* = /= ；II II| A & = ? _ + + _

4、+J | J)J 1)J J/* 运算符表 */int xx035,xx110,xx231;int temp_key3=0,temp_c40=0,temp_c41=0,temp_c42=0,temp_c43=0;初始化函数 */void load()int mm;for (mm=0;mm=34;mm+) xx0mm=0;for (mm=0;mm=9;mm+) xx1mm=0;for (mm=0;mm=30;mm+) xx2mm=0;FILE *floading;if (floading=fopen(key0.txt,w)=NULL) printf(Error! Cant create file

5、 : key0.txt); return;fclose (floading);/* 建立保留字表文件： key0.txt*/if (floading=fopen(key1.txt,w)=NULL) printf(Error! Cant create file : key1.txt); return;/* 建立分隔符表文件： key1.txt*/if (floading=fopen(key2.txt,w)=NULL)printf(Error! Cant create file : key2.txt); return;fclose(floading);/* 建立运算符表文件： key2.txt*/

6、if (floading=fopen(key3.txt,w)=NULL)printf(Error! Cant create file : key3.txt); return;fclose (floading);/* 建立标识符表文件： key3.txt*/if (floading=fopen(c40.txt,w)=NULL)printf(Error! Cant create file : c40.txt); return;fclose (floading);/* 建立整数类型常量表文件： c40.txt*/if (floading=fopen(c41.txt,w)=NULL)printf(Er

7、ror! Cant create file : c41.txt); return;fclose (floading);/* 建立浮点类型常量表文件： c41.txt*/if (floading=fopen(c42.txt,w)=NULL)printf(Error! Cant create file : c42.txt); return;fclose (floading);/* 建立字符类型常量表文件： c42.txt*/if (floading=fopen(c43.txt,w)=NULL)printf(Error! Cant create file : c43.txt); return;fcl

8、ose (floading);/* 建立字符串类型常量表文件： c43.txt*/if (floading=fopen(defination.txt,w)=NULL) printf(Error! Cant create file : defination.txt); return;fclose (floading);/* 建立注释文件： defination.txt*/if (floading=fopen(output.txt,w)=NULL)printf(Error! Cant create file : output.txt); return;fclose (floading);/* 建立

9、内部码文件： output.txt*/if (floading=fopen(temp_key1,w)=NULL) printf(Error! Cant create file : temp_key1); return;fclose (floading);/* 建立保留字临时表文件： temp_key1*/if (floading=fopen(temp_key3,w)=NULL)printf(Error! Cant create file : temp_key3); return;fclose (floading);/* 建立标识符临时文件： temp_key3*/if (floading=fo

10、pen(temp_c40,w)=NULL)printf(Error! Cant create file : temp_c40); return;fclose (floading);/* 建立整数类型常量临时文件： temp_c40*/ if (floading=fopen(temp_c41,w)=NULL) printf(Error! Cant create file : temp_c41); return;fclose (floading);/* 建立浮点类型常量临时文件： temp_c41*/if (floading=fopen(temp_c42,w)=NULL)printf(Error!

11、 Cant create file : temp_c42); return;fclose (floading);/* 建立字符类型常量临时文件： temp_c42*/ if (floading=fopen(temp_c43,w)=NULL) printf(Error! Cant create file : temp_c43); return;fclose (floading);/* 建立字符串类型常量临时文件： temp_c43*/ /* 保留字及标识符判断函数 */void char_search(char *word)int m,line=0,csi=0;int value=0;int v

12、alue2=0;char c,cs100;FILE *foutput,*finput;for (m=1;m*Mlndlno4oso_o4MP0M-Ltoldlu9-=ss%=p%=517=ndln04=lu_d4FB-cxlo芸=)u doTlndlnMlndlno4oso_o4 MP0M-Ltoldlu9-=ss%=p%=517=ndln04=lu_d4M=e=-=ndlno=)u doTlndln+Ltoldlu9Mlndlno4oso_o4MPOM-=ss%=ndlno4=lu_d4-(= L 芸 ldlu9=)u doTlndln so 宀Mlndlno4oso_o4LL_ Ob一 s

13、。一 s。宀-anduu=Qo6T。 Q+土 so一 s。 (-ubl!.。)=IIM (do 山I!.。) 2ZM Mlnduu=Qo6T。-(=-芸 ldlu9=)u doTlndu 匸 宀Mlndlno4oso_o4 e0M-=ss%AW$2=ndln04=lu_d4 FB-cxlo芸=)u doTlndln +ldlu9Mlndlno4oso_o4MPOM-=ss%=ndlno4=lu_d4芸 ldlu9=)u doTlndln ouue 芸 ldlu9 二一 OHCXI nro lu- o$u= -u 一O.LS。lu- -00 匸 soelp+Eldlu9Mlndlno4oso_o

14、4MPOM-=ss%=ndlno4=lu_d4-(=&芸 ldlu9=)u doTlndlnouucxltolduJ9 二一OHCXI nro lu-o$u= -u 一O.LS。lu-00 匸 soelpQElp 】nduu=*ndlnor山 i 匚 (POM*elp)lpees。po*Mlndlno4oso_o4JEOMO芸 ldlu9-=ss% 乍 p% 乍$2一寸=ndln04=lu_d4FB-cxlo芸=)u doTlndlnMlndlno4oso_o4JEOMO芸 ldlu9-=ss% 乍 p% 乍$2一寸=ndln04=lu_d4 M=e=-=ndlno=)u doTlndln+l

15、dlu9Mlndlno4oso_o4MPOM-=ss%=ndlno4=lu_d4-(=-芸 ldlu9=)u doTlndln so 宀Mlndlno4oso_o4 xp0M(Du=-=ss%=p%=$2=ndln04=lu_d4 M=e=-=ndlno=)u doTlndln (UHCXI n_e七-anduu=oso_o4 宀-andu_4)oo6To宀-ucxl nrooupOM-so)dluols)七 匸+u =o上 so_andu_4)oo61To宀-UCXI nrooupOM-so)dluols)七 匸+u =O上 s。_ Ob一 S。一 s。宀-anduu=Qo6T。Q+土 so

16、一 s。(-ubl!.。)=IIM(do 山I!.。) 2ZMMlnduu=Qo6T。-(=-&芸 ldlu9=)u doTlndu 匸宀Mlndln04s0_04 eOM-=ss%AI40=ndlno4=lu_d4FB-cxlCXI芸=)u doTlndln*Mlndlno4oso_o4 MPOM7toldlu9-=ss%=p%10=ndlno4=lu_d4FB-cxlCXI芸=)u doTlndlnMlndlno4oso_o4 MPOM7toldlu9-=ss%=p%10=ndlno4=lu_d4M=e=-=ndlno=)u doTlndln+Eldlu9Mlndlno4oso_o4MPO

17、M-=ss%=ndlno4=lu_d4-(=&芸 ldlu9=)u doTlndln so宀Mlndlno4oso_o4 xpOM(Du=-=ss%=p%10=ndlno4=lu_d4M=e=-=ndlno=)u doTlndln(UHCXI n_e七 -anduu=oso_o4void scan()int count;char chin;FILE *fin;FILE *fout;char filename50;char temp100;char target3=;printf( 请输入文件名： );scanf(%s,filename);if (fin=fopen(filename,r)=NU

18、LL)printf(Error! Cant open file : %sn,filename); return;chin=fgetc(fin);while (chin!=EOF)/* 对文件包含、宏定义进行处理 */if (chin=#)while (chin!=) chin=fgetc(fin);/*chin=fgetc(fin);*/* 对空格符、水平制表符进行处理 */else if (chin= )|(chin=t)J/* 对回车符进行处理 */else if (chin=n)J/* 对单引号内的字符常量进行处理 */else if (chin=target0)if (xx19=0)f

19、out=fopen(key1.txt,a); fprintf(fout,1t9tt%cn,target0); fclose(fout);xx19=1;temp0=chin;chin=fgetc(fin);temp1=chin;chin=fgetc(fin);if (chin!=target0) temp2=chin; chin=fgetc(fin); temp3=chin; temp4=0;else temp2=chin; temp3=0; c_search(temp);/* 对双引号内的字符串常量进行处理*/else if (chin=)int i=0;tempi+=;chin=fgetc(

20、fin);while (chin!=) tempi+=chin; chin=fgetc(fin);tempi=;tempi+1=0;cc_search(temp);/* 对保留字、标识符进行处理 */else if (chin=A)&(chin=a)&(chin=A)&(chin=a)&(chin=0)&(chin=0)&(chin=0)&(chin=9)|(chin=.) if (chin=.)dotcount+;if (dotcount=2)break;tempi+=chin;chin=fgetc(fin);tempi=0;if (dotcount=1)intb_search(temp);

21、elseinta_search(temp);if (chin!=EOF)fseek (fin,-1L,SEEK_CUR);/* 对注释进行处理 */else if (chin=/)chin=fgetc(fin);if (chin=)fout=fopen(output.txt,a);fprintf(fout,2t30tt/=n);fclose(fout);else if (chin!=*)fout=fopen(output.txt,a);fprintf(fout,2t4tt/n);fclose(fout); fseek(fin,-1L,SEEK_CUR);else if (chin=*)coun

22、t=0;chin=fgetc(fin);fout=fopen(defination.txt,a);fprintf(fout,/*);while (count!=2)count=0;while (chin!=*)fprintf(fout,%c,chin); chin=fgetc(fin);count+; fprintf(fout,%c,chin); chin=fgetc(fin);if (chin=/)count+; fprintf(fout,%cn,chin);elsefprintf(fout,%c,chin); chin=fgetc(fin);/* 对运算符、分隔符进行处理 */elsein

23、t time=0;int firstblood=0; temp0=chin; chin=fgetc(fin); if (chin!=EOF) temp1=chin; temp2=0;for (time=1;time=30;time+) if (strcmp(temp,key2time)=0) firstblood=1;if (xx2time=0)fout=fopen(key2.txt,a);fprintf(fout,2t%dtt%sn,time,temp);fclose(fout);xx2time=1;fout=fopen(output.txt,a);fprintf(fout,2t%dtt%s

24、n,time,temp); fclose(fout);break;if (firstblood!=1)fseek(fin,-1L,SEEK_CUR);temp1=0;for (time=1;time=9;time+)if (strcmp(temp,key1time)=0)if (xx1time=0)fout=fopen(key1.txt,a); fprintf(fout,1t%dtt%sn,time,temp); fclose(fout);xx1time=1;fout=fopen(output.txt,a);fprintf(fout,1t%dtt%sn,time,temp);fclose(fo

25、ut);break;for (time=1;time 查看保留字表文件1 - 查看分隔符表文件2 - 查看运算符表文件3 - 查看标识符表文件4 - 查看整数类型常量表5 - 查看浮点类型常量表6 - 查看字符类型常量表7 - 查看字符串类型常量表8 - 查看注释文件9 - 查看内部码文件Q - 退出*n);*n);*n);*n);*n);*n);*n);*n);*n);*n);*n);*n);*n);*n);*n);*n);printf(*n);printf(n);load();scan();printf(n);printf( 分析完成！ n);getchar();printf(n);pri

26、ntf( 请输入命令： );command=getchar();while (command!=Q)&(command!=q) switch (command) case 0:printf(H*n);printf(n);fread=fopen(key0.txt,r);case 1:case 2:charin=fgetc(fread);while (charin!=EOF)putchar(charin); charin=fgetc(fread);printf(n);printf(printf(n);printf( 请输入命令： ); break;printf(*n);printf(n);frea

27、d=fopen(key1.txt,r);charin=fgetc(fread);while (charin!=EOF)putchar(charin); charin=fgetc(fread);printf(n);printf(*n);H*printf(n);printf( 请输入命令： ); break;printf(*n);H*printf(n);fread=fopen(key2.txt,r);charin=fgetc(fread);while (charin!=EOF)putchar(charin);charin=fgetc(fread);printf(n);printf(*n);H*pr

28、intf(n);printf( 请输入命令： ); break;*n);printf(*n);printf(n);fread=fopen(key3.txt,r);charin=fgetc(fread);while (charin!=EOF)putchar(charin);charin=fgetc(fread);printf(n);printf(*n);printf(n);printf( 请输入命令： );case 4:break;printf(*n);printf(n);fread=fopen(c40.txt,r);charin=fgetc(fread);while (charin!=EOF)putchar(charin);charin=fgetc(fread);printf(n);printf(*n);printf(n);printf( 请输入命令： );break