-
Notifications
You must be signed in to change notification settings - Fork 0
/
RotateString.c
85 lines (77 loc) · 1.74 KB
/
RotateString.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
#define _CRT_SECURE_NO_WARNINGS 1
//1、实现一个函数,可以左旋字符串中的k个字符。
//ABCD左旋一个字符得到BCDA
//ABCD左旋两个字符得到CDAB
//2、.判断一个字符串是否为另外一个字符串旋转之后的字符串。
//例如:
//给定s1 = AABCD和s2 = BCDAA,返回1
//给定s1 = abcd 和 s2 = ACBD,返回0
//AABCD左旋一个字符得到ABCDA
//AABCD左旋两个字符得到BCDAA
//AABCD右旋一个字符得到DAABC
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
char * RotateString(char *arr, int num, int size);
int CheckString(char *arr1, char *arr2, int size1, int size2);
int CheckCycle(char *p, char *q);
int main()
{
char arr1[] = "ABCDEFG";
char arr2[] = "CDEFGAB";
int num = 5;
int size1 = sizeof(arr1);
int size2 = sizeof(arr1);
printf("%s\n", RotateString(arr1, num, size1));
//输出旋转之后的字符串
printf("%d\n", CheckString(arr1, arr2, size1, size2));
//返回是否是旋转的字符串,是为1,不是为0
system("pause");
return 0;
}
char * RotateString(char *arr, int num, int size)
{
char * p = (char*)malloc(sizeof(char)*size);//分配n个空间供旋转后数组存储
char * head = p;//头指针,保存头
int i = 0;
for (i = num; i < size-1; i++)
{
*p++ = *(arr + i);//不旋转部分的CD先存入p
}
for (i = 0; i < num; i++)
{
*p++ = *(arr + i);//旋转部分AB存入数组p
}
*p = '\0';//最后给个\0结束数组
return head;
}
int CheckString(char *arr1, char *arr2, int size1, int size2)
{
char *p = arr1;//p指向arr1,q指向arr2
char *q = arr2;
while (*q != '\0')
{
if (*p == *q)
{
if (CheckCycle(p, q))//判断是否旋转,若旋转返回1
{
return 1;
}
}
q++;
}
return 0;//若运行至此处,说明没有匹配旋转的字符串,返回0
}
int CheckCycle(char *p, char *q)
{
while (*q != '\0')
{
if (*p != *q)//不等直接返回0,相等继续判断直到q指向最后一个字符
{
return 0;
}
p++;
q++;
}
return 1;
}