KMP

#include"stdio.h"
#include"string.h"
#define M 4444
int next[M],ans;
void getNext(char *b)
{
    int i,j;
    i=0;
    j=-1;
    next[0]=-1;
    while(b[i]!='')
    {
        if(j==-1||b[i]==b[j])
        {
            i++;
            j++;
            next[i]=j;
        }
        else
            j=next[j];
    }
}
void KMP(char *a,char *b)
{
    int i,j;
    i=j=0;
    int m=strlen(b);
    while(a[i]!='')
    {
        if(j==-1||a[i]==b[j])
        {
            i++;
            j++;
        }
        else
            j=next[j];
        if(j==m)
        {
            ans++;
            j=next[j];
        }
    }
}
int main()
{
    char ch[M],str[M];
    while(scanf("%s",str),strcmp(str,"#")!=0)
    {
        scanf("%s",ch);
        getNext(ch);
        ans=0;
        KMP(str,ch);
        printf("%d
",ans);
    }
}

aaaa aa

#

3

#include"stdio.h"
#include"string.h"
#define M 4444
int next[M],ans;
void getNext(char *b)
{
    int i,j;
    i=0;
    j=-1;
    next[0]=-1;
    while(b[i]!='')
    {
        if(j==-1||b[i]==b[j])
        {
            i++;
            j++;
            next[i]=j;
        }
        else
            j=next[j];
    }
}
void KMP(char *a,char *b)
{
    int i,j;
    i=j=0;
    int m=strlen(b);
    while(a[i]!='')
    {
        if(j==-1||a[i]==b[j])
        {
            i++;
            j++;
        }
        else
            j=next[j];
        if(j==m)
        {
            ans++;
            j=next[j]+m;//区别
        }
    }
}
int main()
{
    char ch[M],str[M];
    while(scanf("%s",str),strcmp(str,"#")!=0)
    {
        scanf("%s",ch);
        getNext(ch);
        ans=0;
        KMP(str,ch);
        printf("%d
",ans);
    }
}

aaaaa aa

#

2