#include??
#include??
#include??
#define?N?100??
??
int?seekProd（int?stackTopint?inputstrTop）;??
//char?inputstr[10]=“i*i+i#“;??
char?inputstr[20];??
char?stack[10]=““;??
??
typedef?struct?production{??
????char?leftChar;??
????char?rightChars[4];??
????char?allChars[8];??
}Prod;??
??
Prod?productions[8];??
void?init（）;??
int?stackPush（int?*top?Prod?prod）;??
int?matching（int?*top?char?*inputstr）;??
int?main（）??
{??
????int?len;//輸入串的長(zhǎng)度??
????int?stackTop=1;??
????int?inputstrTop=0;??
????int?i;??
????char?*z=“#“;??
????int?index=0;??
??
??????
????init（）;//產(chǎn)生式初始化??
??????
????stack[0]=‘#‘;??
????stack[stackTop]=‘E‘;??
????printf（“請(qǐng)輸入字符串：“）;??
????gets（inputstr）;??
??????
????len=strlen（inputstr）;??
????inputstr[len]=‘#‘;??
????while（?stackTop>=0?）??
????{??
????//??printf（“%d%d\n“stackTopinputstrTop）;??
????????printf（“第%2d步：“++index）;??
????????printf（“當(dāng)前棧：%-8s“stack）;??
????????printf（“輸入字符串：%8s“inputstr）;??
????????//根據(jù)棧定元素和字符串首字母??
??????????
????????if（matching（&stackTopinputstr））{??
????????????printf（“\n“）;??
????????}else{??
????????????i=seekProd（stackTopinputstrTop）;??
????????????stackPush（&stackTopproductions[i]）;//壓棧??
????????????printf（“進(jìn)行下一步所用的產(chǎn)生式：%s\n“productions[i].allChars）;??
????????}?????????
????}??
????if（stackTop+1==0）??
????{??
????????printf（“分析成功！\n“）;??
????}??
??
????return?0;??
}??
??
//搜索分析表??
int?seekProd（int?stackTopint?inputstrTop）??
{??
//??printf（“stack[stackTop]=%c\n“stack[stackTop]）;??
????if（stack[stackTop]==‘E‘）{??
????????if（inputstr[inputstrTop]==‘i‘）??
????????{??
????????????return?0;??
????????}else?if（inputstr[inputstrTop]==‘（‘）{??
????????????return?0;??
????????}else{??
????????????return?-1;??
????????}??
????}else?if（stack[stackTop]==‘X‘）{??
????????if（inputstr[inputstrTop]==‘+‘）??
????????{??
????????????return?1;??
????????}else?if（inputstr[inputstrTop]==‘）‘）{??
????????????return?2;??
????????}else?if（inputstr[inputstrTop]==‘#‘）{??
????????????return?2;??
????????}else{??
????????????return?-1;??
????????}??
????}else?if（stack[stackTop]==‘T‘）{??
????????if（inputstr[inputstrTop]==‘i‘）??
????????{??
????????????return?3;??
????????}else?if（inputstr[inputstrTop]==‘（‘）{??
????????????return?3;??
????????}else{??
????????????return?-1;??
????????}??
????}else?if（stack[stackTop]==‘Y‘）{??
????????if（inputstr[inputstrTop]==‘+‘）??
????????{??
????????????return?5;??
????????}else?if（inputstr[inputstrTop]==‘*‘）{??
????????????return?4;??
????????}else?if（inputstr[inputstrTop]==‘）‘）{??
????????????return?5;??
????????}else?if（inputstr[inputstrTop]==‘#‘）{??
????????????return?5;??
????????}else{??
????????????return?-1;??
????????}??
????}else?if（stack[stackTop]==‘F‘）{??
????????if（inputstr[inputstrTop]==‘i‘）{??
????????????return?7;??
????????}else?if（inputstr[inputstrTop]==‘（‘）{??
????????????return?6;??
????????}else{??
????????????return?-1;??

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----
?????目錄???????????0??2017-04-17?16:13??語(yǔ)法分析器\
?????文件????????4907??2017-04-17?16:13??語(yǔ)法分析器\語(yǔ)法分析器代碼.c
?????文件???????75776??2017-04-12?22:49??語(yǔ)法分析器\語(yǔ)法分析器實(shí)驗(yàn)報(bào)告.doc