编译原理课程设计-词法分析器(附含源代码)

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else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\ else if(strcmp(p,\

else {fprintf(outfile,\未定义\\n\ }

void main() {FILE *fp,*out; int i=0,x=0,y=0; int EA=0;

char ch,str[10000],idstr[10],systr[2]; if((fp=fopen(\ {printf(\ exit(0);}

if((out=fopen(\ {printf(\ exit(0);} ch=fgetc(fp);

while(ch!=EOF)

{str[i]=ch;str[i+1]='\\0';i++;ch=fgetc(fp);} i=0;

while(1) {

if(str[i]=='@') break; else

if((str[i]>='a'&&str[i]<='z')||(str[i]>='A'&&str[i]<='Z')|| (str[i]>='0'&&str[i]<='9')||(str[i]=='_')) {idstr[x]=str[i];idstr[x+1]='\\0';x++;i++;EA=1;} else {

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x=0;

if((strlen(idstr)!=0)&&(EA)) analzid(out,idstr); idstr[x]='\\0';

if(str[i]<'0'||(str[i]>'9'&&str[i]<'A')|| (str[i]>'Z'&&str[i]<'a')||str[i]>'z') {

if(str[i]!='!'&&str[i]!='='&&str[i]!='<'&&str[i]!='>') {

systr[y]=str[i];systr[y+1]='\\0';analzsy(out,systr);i++; }

else

if((str[i]=='!'&&str[i+1]=='=')||(str[i]=='='&&str[i+1]=='=')||

(str[i]=='>'&&str[i+1]=='=')||(str[i]=='<'&&str[i+1]=='=')||

(str[i]=='<'&&str[i+1]=='<')||(str[i]=='>'&&str[i+1]=='>')) {

systr[y]=str[i];systr[y+1]=str[i+1];systr[y+2]='\\0'; analzsy(out,systr);i++;i++; } else {

systr[y]=str[i];systr[y+1]='\\0';analzsy(out,systr);i++; }}}}

printf(\全部结果已经存入outfile.txt文档-----\\n\ fprintf(out,\完成--------\ fclose(fp); fclose(out); }

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