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ID:50957034
大小:173.00 KB
页数:24页
时间:2020-03-16
《预测分析算法的设计与实现.doc》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、预测分析算法的设计与实现程序代码:#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
2、度*/structpRNode*rHead;/*右部结点头指针*/};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;voidShowAT();/*输出分析表*/voidId
3、entify(char*st);voidInitStack();voidShowStack();voidPop();voidPush(intr);intmain(){chartodo,ch;Init();InputVn();InputVt();InputP();getchar();FirstFollow();printf("所得first集为:");ShowCollect(first);printf("所得follow集为:");ShowCollect(follow);CreateAT();ShowAT();
4、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&&i5、;}elseprintf("输入出错!");}}getchar();}voidInit(){inti,j;vnNum=0;vtNum=0;PNum=0;for(i=0;i<=MaxVnNum;i++)Vn[i]=' ';for(i=0;i<=MaxVtNum;i++)Vt[i]=' ';for(i=0;i6、}}intIndexCh(charch){intn;n=0;/*isVn?*/while(ch!=Vn[n]&&' '!=Vn[n])n++;if(' '!=Vn[n])return100+n;n=0;/*isVt?*/while(ch!=Vt[n]&&' '!=Vt[n])n++;if(' '!=Vt[n])returnn;return-1;}/*输出Vn或Vt的内容*/voidShowChArray(char*collect){intk=0;while(' '!=collect[k]){prin7、tf("%c",collect[k++]);}printf("");}/*输入非终结符*/voidInputVn(){{Vn[n++]=' ';}n=0;while(('#'!=ch)&&(n8、ile('#'!=(ch=getchar()));printf("符号数目超过限制!");inErr=1;continue;}{printf("输入正确确认?(y/n):");}scanf("%c",&ch);}if('n'==ch){printf("录入错误重新输入!");inErr=1;}else{inErr=0;}}}/*输入终结符*/voidInputVt(){intinErr=
5、;}elseprintf("输入出错!");}}getchar();}voidInit(){inti,j;vnNum=0;vtNum=0;PNum=0;for(i=0;i<=MaxVnNum;i++)Vn[i]=' ';for(i=0;i<=MaxVtNum;i++)Vt[i]=' ';for(i=0;i6、}}intIndexCh(charch){intn;n=0;/*isVn?*/while(ch!=Vn[n]&&' '!=Vn[n])n++;if(' '!=Vn[n])return100+n;n=0;/*isVt?*/while(ch!=Vt[n]&&' '!=Vt[n])n++;if(' '!=Vt[n])returnn;return-1;}/*输出Vn或Vt的内容*/voidShowChArray(char*collect){intk=0;while(' '!=collect[k]){prin7、tf("%c",collect[k++]);}printf("");}/*输入非终结符*/voidInputVn(){{Vn[n++]=' ';}n=0;while(('#'!=ch)&&(n8、ile('#'!=(ch=getchar()));printf("符号数目超过限制!");inErr=1;continue;}{printf("输入正确确认?(y/n):");}scanf("%c",&ch);}if('n'==ch){printf("录入错误重新输入!");inErr=1;}else{inErr=0;}}}/*输入终结符*/voidInputVt(){intinErr=
6、}}intIndexCh(charch){intn;n=0;/*isVn?*/while(ch!=Vn[n]&&' '!=Vn[n])n++;if(' '!=Vn[n])return100+n;n=0;/*isVt?*/while(ch!=Vt[n]&&' '!=Vt[n])n++;if(' '!=Vt[n])returnn;return-1;}/*输出Vn或Vt的内容*/voidShowChArray(char*collect){intk=0;while(' '!=collect[k]){prin
7、tf("%c",collect[k++]);}printf("");}/*输入非终结符*/voidInputVn(){{Vn[n++]=' ';}n=0;while(('#'!=ch)&&(n8、ile('#'!=(ch=getchar()));printf("符号数目超过限制!");inErr=1;continue;}{printf("输入正确确认?(y/n):");}scanf("%c",&ch);}if('n'==ch){printf("录入错误重新输入!");inErr=1;}else{inErr=0;}}}/*输入终结符*/voidInputVt(){intinErr=
8、ile('#'!=(ch=getchar()));printf("符号数目超过限制!");inErr=1;continue;}{printf("输入正确确认?(y/n):");}scanf("%c",&ch);}if('n'==ch){printf("录入错误重新输入!");inErr=1;}else{inErr=0;}}}/*输入终结符*/voidInputVt(){intinErr=
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