词法分析器

cout<<\

else if(bring[i]=='1') cout<<\

else if(bring[i]=='2') cout<<\

else if(bring[i]=='3') cout<<\

else if(bring[i]=='4') cout<<\

else if(bring[i]=='5') cout<<\

else if(bring[i]=='6') cout<<\

else if(bring[i]=='7') cout<<\

else if(bring[i]=='8') cout<<\

else if(bring[i]=='9') cout<<\

else if(bring[i]=='A') cout<<\

else if(bring[i]=='B') cout<<\

else if(bring[i]=='C') cout<<\

else if(bring[i]=='D') cout<<\

else if(bring[i]=='E') cout<<\

else cout<<\ } }

void Sao_Miao() {

for(n=0;n<9;n++) {

bring[n]=NULL; } ch=prog[p]; p++;

while(ch==' ') { ch=prog[p]; p++; }

if(ch=='\\n') hanghao++;

if((ch>='a'&&ch<='z')||(ch>='A'&&ch<='Z')||ch=='_') //可能是标示符或者变量名

{ m=0; int flag3=0;

while((ch>='0'&&ch<='9')||(ch>='a'&&ch<='z')||(ch>='A'&&ch<='Z')||ch=='_'||ch=='@'||ch=='$'||ch=='^'||ch=='&'||ch=='~'||ch=='?')

{

bring[m]=ch; m++; ch=prog[p]; p++;

if(ch=='@'||ch=='$'||ch=='^'||ch=='&'||ch=='~'||ch=='?')

flag3=1; }

bring[m]='\\0'; p--; Lei_Xing=6002; if(flag3==1) Lei_Xing=3333;//非法字符 char temp[20];

for(n=0;n<8;n++) //将识别出来的字符和已定义的标示符作比较，

{

if(strcmp(bring,keyword[n])==0) { Lei_Xing=6001; break; }

for(int i=0;i<=m;i++) {

if(bring[i]>='A'&&bring[i]<='Z') temp[i]=bring[i]+32; else

temp[i]=bring[i]; }

if(strcmp(temp,keyword[n])==0) {

Lei_Xing=1111;//大小写拼写错误 break; } } int xx=m;

if(xx>8)//判断是否超出8位字符 { Lei_Xing=4444; } }

else if((ch>='0'&&ch<='9')) //数字,十六进制只能以数字开头， {

if(ch=='0') { m=0;

bring[m++]=ch; ch=prog[p++];

if(ch=='X') //数字,识别十六进制 {

bring[m++]=ch; ch=prog[p++];

while((ch>='0'&&ch<='9')||(ch>='A'&&ch<='F')) {

bring[m++]=ch;