C language: determines whether a string is a rotated string of another string.

C language: determines whether a string is a rotated string of another string.

#define _CRT_SECURE_NO_WARNINGS 1#include<stdio.h>#include <string.h>void reserve(char *left, char*right){ while (left < right) {  char tmp = *left;  *left = *right;  *right = tmp;  left++;  right--; }}void left_reserve(char arr[], int k){ int len = strlen(arr) - 1; char *pstart = &arr[0]; char *pend = arr + len; reserve(pstart, pstart + k - 1); reserve(pstart + k, pend); reserve(pstart, pend);}void right_reserve(char arr[], int k){ int len = strlen(arr) - 1; char *pstart = &arr[0]; char *pend = arr + len; reserve(pstart, pstart + len - k); reserve(pend - k+1, pend); reserve(pstart, pend);}int main(){ char arr[10] = "AABCD"; char arr2[10] = "ABCDA"; char *p = arr; int k = 5; while (k) {  left_reserve(arr, k);  if (strcmp(arr, arr2) == 0)  {   printf("1\n");   break;  }  right_reserve(p, k);  if (strcmp(p, arr2) == 0)  {   printf("1\n");   break;  }  k--; } if (0 == k) {  printf("0\n"); } system("pause");}