KMP算法练习

#include <stdio.h>

getNext(char str[],int n, int next[]){
    int i, j;
    i = 1;
    j = 0;
    next[0] = -1;
    next[1] = 0;
    while(i < n){
        if(str[i] == str[j]){
            i++;
            j++;
            next[i] = j;
        }
        else if(j == 0){
            i++;
            next[i] = 0;
        }
        else j = next[j];
    }
}

KMP(char content[], int n, char str[], int m, int next[]){
    int i, j;
    i = 0;
    j = 0;
    while(i < n && j < m){
        if(content[i] == str[j]){
            i++;
            j++;
        }
        else if(j == 0){
            i++;
        }
        else{
            j = next[j];
        }
    }
    if(j == m) printf("%d", 1);
    else printf("%d", 0);
}

main(){
    int i;
    int next[10];
    char str[] = {'a', 'b', 'c', 'a', 'b', 'c', 'a', 'a', 'a'};
    char content[] = {'r', 'a', 'b', 'c', 'a', 'A', 'c', 'a', 'a', 'a', 'c'};
    getNext(str, 9, next);
    for(i = 0; i < 9; i++) printf("%d ",next[i]);
    printf("\n");
    KMP(content, 11, str, 9, next);
}