数据结构C语言串的基本操作

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1、文档供参考，可复制、编制，期待您的好评与关注！ 串的基本操作#include#include#include#define m 100typedef structchar chm;int length;Hstr;void main()Hstr *l,*p,*r;char c,w;int h,j,k;int i=0;l=(Hstr *)malloc(sizeof(Hstr);p=(Hstr *)malloc(sizeof(Hstr);r=(Hstr *)malloc(sizeof(Hstr);l-length=0; p-length=0;r-length=0;printf(请选择相关操作（数字1

2、5控制,输入0结束）n);printf(-1.建立串-n);printf(-2.显示串长度-n);printf(-3.生成与原来相同的串-n);printf(-4.串比较-n);printf(-5.串连接-n);printf(-6.返回值-n);scanf(%c,&w);getchar();while(w)switch(w)case 1:printf(请输入字符(#结束):n);scanf(%c,&c);while(c!=#) l-length+;l-chi=c;i+;scanf(%c,&c);printf(串中字符为n);for(i=0;ilength;i+)printf(%c,l-chi)

3、; printf(n);break;case 2: printf(串长度为%dn,l-length);break;case 3: for(i=0;ilength;i+) p-chi=l-chi; p-length=l-length; printf(复制的串中字符为n);for(i=0;ilength;i+)printf(%c,p-chi); printf(n); break;case 4:i=0;printf(请输入要与原串比较的字符串(#结束):n);scanf(%c,&c);while(c!=#) r-length+;r-chi=c;i+;scanf(%c,&c);printf(第二个串中

4、字符为n);for(i=0;ilength;i+)printf(%c,r-chi); printf(n); for(i=0;ilength&ilength;i+)if(l-chi!=r-chi)if(l-chi-r-chi)chi-r-chi)0)printf(第一个串大); printf(n);break;if(i=r-length|i=l-length)printf(两个串一样大n); break;case5:i=0;printf(请输入要与原串连接的串（#结束）n); scanf(%c,&c);while(c!=#)r-length+;r-chi=c;i+;scanf(%c,&c);pr

5、intf(第二个串中字符为n);for(i=0;ilength;i+)printf(%c,r-chi); printf(n);for(i=0,j=0;ilength;i+,j+)l-chl-length+i=r-chj;l-length=l-length+r-length;printf(连接后第一个串中字符为n);for(i=0;ilength;i+)printf(%c,l-chi); printf(n);break;case 6:i=0;printf(请输入要找串的起始位置（第几个字符？）n); scanf(%d,&h); printf(请输入要找的字符个数n); scanf(%d,&k);

6、 printf(内容为：n); for(i=0;ichh-1); h+; printf(n); break;getchar();printf(请选择相关操作（数字16控制,输入0结束）n);printf(-1.建立串-n);printf(-2.显示串长度-n);printf(-3.生成与原来相同的串-n);printf(-4.串比较-n);printf(-5.串连接-n);printf(-6.返回值-n); scanf(%c,&w);getchar();模式匹配#include#include#include#define bool int#define true 1#define false

7、 0typedef structchar *ch;int length;HString;bool assign(HString *t,char *chs)int i=0;char *c=chs,*d=chs;while(ci)/c不为空时进入循环i+;/计算字符串常量chs的长度if(!i)t-ch=NULL;t-length=0;elset-ch=(char*)malloc(i*sizeof(char);c=t-ch;if(!t-ch)/如果没有申请到空间return -1;while(*chs)/chs不为空时进入循环*c+=*chs+;t-length=i;return true;boo

8、l insert(HString *s,int pos,HString *t)if(poss-length)return false;if(t-length)/t非空int i=0;if(!(s-ch=(char*)realloc(s-ch,(s-length+t-length)*sizeof(char)exit(-1);for(i=s-length-1;i=pos;i-)s-chi+t-length=s-chi;for(i=0;ilength;i+)s-chpos+i=t-chi;s-length+=t-length;return true;int strLength(HString *s)

9、return s-length;int strCompare(HString *s,HString *t)int i;for(i=0;ilength&ilength;i+)if(s-chi!=t-chi)return s-chi - t-chi;return s-length - t-length;bool subString(HString *sub,HString *s,int pos,int len)if(pos=s-length|len s-length)return false;if(sub-ch)free(sub-ch);if(!len)sub-ch=NULL;sub-length

10、=0;elseint i=0;sub-ch=(char*)malloc(len*sizeof(char);for(;ichi=s-chpos+i;sub-length=len;return true;void printStr(HString *t)int i=0;while(i+length)putchar(t-chi-1);/printf(第%d个：%cn,i-1,t-chi-1);putchar(n);int indexBF(HString *s,HString *t,int pos)int i=pos,j=0;if(pos0) return -1;while(i length & j

11、length)if(s-chi=t-chj)i+;j+;elsei=i-j+1;j=0;if(j=t-length)return i-t-length;return -1;int findNext(HString *p,int *next)int i=0,j=-1;next0=-1;while(ilength)while(j=-1|i length & p-chi=p-chj)i+;j+;if(p-chi!=p-chj)nexti=j;elsenexti=nextj;j=nextj;return -1;void findNextString(char *p,int *next)int len=

12、strlen(p);int i=0,j=-1;next0=-1;while(ilength;char *c=p-ch;int i=0,j=-1;next0=-1;while(ilength)if(j=-1|ci=cj)i+,j+;if(ci!=cj)nexti=j;elsenexti=nextj;elsej=nextj;int kmpString(char *t,char *p,int pos)int i=pos,j=0,plen=strlen(p),tlen=strlen(t);int *next=(int*)malloc(plen*sizeof(int);findNextString(p,

13、next);while(itlen & jlength*sizeof(int);int i=pos,j=0;findNext2(p,next);while(ilength&jlength)if(j=-1|p-chj=t-chi)i+,j+;elsej=nextj;if(j=p-length)return i-j;return -1;int kmp(HString *t,HString *p,int pos)int *next=(int*)malloc(p-length*sizeof(int);int i=pos,j=0;findNext(p,next);while(ilength-p-length)while(j=-1|jlength & p-chj=t-chi)i+;j+;if(j=p-length)return i-p-length;j=nextj;return -1;int main()HString s1,s2;char a100,b100;int pos;puts(输入主串);gets(a);puts(输入模式串);gets(b);assign(&s1,a);assign(&s2,b);puts(输入匹配起始下标);scanf(%d,&pos);printf(%dn,kmp2(&s1,&s2,pos);system(pause);return 0;13 / 13