Wu Yudong's Blog

int BF(char *x, int m, char *y, int n) {
   int i, j;
   /* 搜索*/
   for (j = 0; j <= n - m; ++j) {
      for (i = 0; i < m && x[i] == y[i + j]; ++i);
          if (i >= m)
              return j;
   }
}

#define EOS '\0'
   
int BF(char *x, int m, char *y, int n) { 
  char *yb; 
  /* 匹配*/ 
  for (yb = y; *y != EOS; ++y) 
      if (memcmp(x, y, m) == 0) 
          return y - yb;
}