编译原理-LL文法源代码.doc

《编译原理-LL文法源代码.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、LL（1）文法（源代码）#include"stdio.h"#include"stdlib.h"#defineMaxRuleNum8#defineMaxVnNum5#defineMaxVtNum5#defineMaxStackDepth20#defineMaxPLength20#defineMaxStLength50structpRNode/*产生式右部结构*/{intrCursor;structpRNode*next;};structpNode{intlCursor;intrLength;/*右部长度*/structpRNode*rHead;/*右部结点头指针*/

2、};charVn[MaxVnNum+1];/*非终结符集*/intvnNum;charVt[MaxVtNum+1];/*终结符集*/intvtNum;structpNodeP[MaxRuleNum];intPNum;charbuffer[MaxPLength+1];charch;charst[MaxStLength];/*要分析的符号串*/structcollectNode{intnVt;structcollectNode*next;};structcollectNode*first[MaxVnNum+1];/*first集*/structcollectNode*

3、follow[MaxVnNum+1];/*follow集*/intanalyseTable[MaxVnNum+1][MaxVtNum+1+1];intanalyseStack[MaxStackDepth+1];/*分析栈*/inttopAnalyse;/*分析栈顶*/voidInit();/*初始化*/intIndexCh(charch);voidInputVt();/*输入终结符*/voidInputVn();/*输入非终结符*/voidShowChArray(char*collect,intnum);/*输出Vn或Vt的内容*/voidInputP();/*产

4、生式输入*/boolCheckP(char*st);/*判断产生式正确性*/voidFirst(intU);voidAddFirst(intU,intnCh);/*加入first集*/boolHaveEmpty(intnVn);voidFollow(intV);/*计算follow集*/voidAddFollow(intV,intnCh,intkind);voidShowCollect(structcollectNode**collect);/*输出first或follow集*/voidFirstFollow();/*计算first和follow*/voidCre

5、ateAT();/*构造预测分析表*/voidShowAT();/*输出分析表*/voidIdentify(char*st);voidInitStack();voidShowStack();voidPop();voidPush(intr);voidmain(void){chartodo,ch;Init();InputVn();InputVt();InputP();getchar();FirstFollow();printf("所得first集为：");ShowCollect(first);printf("所得follow集为：");ShowCollect(foll

6、ow);CreateAT();ShowAT();todo='y';while('y'==todo){printf("是否继续进行句型分析？(y/n):");todo=getchar();while('y'!=todo&&'n'!=todo){printf("(y/n)?");todo=getchar();}if('y'==todo){inti;InitStack();printf("请输入符号串(以#结束):");ch=getchar();i=0;while('#'!=ch&&i

7、++]=ch;}ch=getchar();}if('#'==ch&&i

8、ength