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{

switch(T.len-V.len) {

case 0: /*´®TµÄ³¤¶ÈµÈÓÚ´®VµÄ³¤¶È*/ for(i=0;i<=V.len;i++) /*ÓÃVÌæ»»T*/ S->ch[pos+i]=V.ch[i];

case >0: /*´®TµÄ³¤¶È´óÓÚ´®VµÄ³¤¶È*/ for(i=pos+t.ien;ilen;i--) /*½«SÖÐ×Ó´®TºóµÄËùÓÐ×Ö·û S->ch[i-t.len+v.len]=S->ch[i]; Ç°ÒÆT.len-V.len¸öλÖÃ*/ for(i=0;i<=V.len;i++) /*ÓÃVÌæ»»T*/ S->ch[pos+i]=V.ch[i]; S->len=S->len-T.len+V.len;

case <0: /*´®TµÄ³¤¶ÈСÓÚ´®VµÄ³¤¶È*/ if(S->len-T.len+V.len)<= MAXLEN /*²åÈëºó´®³¤Ð¡ÓÚMAXLEN*/ { /*½«SÖÐ×Ó´®TºóµÄËùÓÐ×Ö·ûºóÒÆV.len-T.len¸öλÖÃ*/ for(i=S->len-T.len+V.len;i>=pos+T.len;i--) S->ch[i]=S->ch[i-T.len+V.len];

for(i=0;i<=V.len;i++) /*ÓÃVÌæ»»T*/ S->ch[pos+i]=V.ch[i]; S->len=S->len-T.len+V.len; } else

{ /*Ìæ»»ºó´®³¤>MAXLEN,µ«´®V¿ÉÒÔÈ«²¿Ìæ»»*/ if(pos+V.len<=MAXLEN)

{ for(i=MAXLEN-1;i>=pos+T.len; i--) S->ch[i]=s->ch[i-T.len+V.len]

for(i=0;i<=V.len;i++) /*ÓÃVÌæ»»T*/ S->ch[pos+i]=V.ch[i]; S->len=MAXLEN;}

else /*´®VµÄ²¿·Ö×Ö·ûÒªÉáÆú*/ { for(i=0;ich[i+pos]=V.ch[i]; S->len=MAXLEN;} }/*switch()*/

pos=StrIndex(S,pos+V.len,T); /*ÇóSÖÐÏÂÒ»¸ö×Ó´®TµÄλÖÃ*/ }/*while()*/ return(1);

}/*StrReplace()*/

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typedef struct Node { char data;

struct Node *next; }Node,*Lstring;

int strIndex(Lstring S, int pos, Lstring T)

/*´Ó´®SµÄposÐòºÅÆð£¬´®TµÚÒ»´Î³öÏÖµÄλÖà */ {

Node *p, *q, *Ppos; int i=0£¬,j=0;

if(T->next= =NULL || S->next = =NULL) return(0); p=S->next; q=T->next;

while(p!=NULL && jnext; j++;}

if(j!=pos) return(0); while(p!=NULL && q!=NULL) {

Ppos=p; /*PposÖ¸Ïòµ±Ç°Æ¥ÅäµÄÆðʼ×Ö·û*/ if(p->data = = q->data)

{p=p->next; q=q->next;}

else /*´ÓPposÖ¸Ïò×Ö·ûµÄÏÂÒ»¸ö×Ö·ûÆð´ÓÐÂÆ¥Åä*/

{p=Ppos->next; q=T->head->next; i++;} }

if(q= =NULL) return(pos+i); /*Æ¥Åä³É¹¦*/ else return(0); /*ʧ°Ü*/ }

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