词法分析器源代码

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1、#include#include#include#defineMaxSize117//关键字的个数#defineMaxSize220//运算符的个数#defineMaxSize34//结束符的个数//数据结构structTNode{charvalue[20];//存放标识符的值intnumber;//存放标识符的种别码chardescription[20];//描述}KeyWords[MaxSize1],Operation[MaxSize2],EndOperation[MaxSize3];//存放关键字的数组char*Wo

2、rdsBuff[MaxSize1]={"const","long","float","double","void","main","if","else","then","break","int","char","include","for","while","printf","scanf"};//存放运算符的数组char*OperationBuff[MaxSize2]={"+","-","*","/","+=","-=","*=","++","--","<","<=",">",">=","<>","=","(",")","#","{","}"};charEndOperation

3、Buff[MaxSize3]={'',';','','t'};//存放词法分析程序输出的结果TNodeTable1[500];TNodeVariable[100];//标识符表TNodeConst[100];//关键字数组初始化voidinputKeyWords(char*buff[],intsize){//关键字编码从1-sizefor(inti=0;i

4、运算符数组初始化voidinputOperation(char*buff[],intsize){//运算符编码从50-(50+size)for(inti=0;i

5、dOperation[i].value[0]=buff[i];EndOperation[i].value[1]='';EndOperation[i].number=i+100;strcpy(EndOperation[i].description,"结束符");}}//输出数据结构数组中的信息voidoutputInfo(TNodea[],intsize){for(inti=0;i

6、.description);printf("");}}voidoutInfoToFile(TNodea[],intsize,FILE*out){//将词法分析程序的结果输出到文件中去for(inti=0;i

7、etChar(FILE*fp){charch=fgetc(fp);returnch;}//判读是否是运算符intisOperation(chara[]){//返回i表示是运算符在运算符数组中的位置//返回-1表示不是运算符intresult;for(inti=0;i