1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #include<string.h>
 4 
 5 void left_rotate(char *str, int k)
 6 {
 7     int len=strlen(str);
 8     k %= len;//減少重復次數
 9 
10     char temp = 0;
11     char *cur = str;
12     while (k--)
13     {
14 
15         //左旋一次
16         temp = *str;
 
17         cur = str;
18         while (*(cur + 1) != ‘\0‘)
19         {
20             //每個字符向前推一個
21             *cur = *(cur + 1);
22             cur++;
23         }
24 
25         *cur = temp;
26     }
27 }
28 
29 
30 
31 int main()
32 {
33     char str[100] = "abcdefg";
34     left_rotate(str, 2);
35     printf("
 
%s\n", str);
36 
37     system("pause");
38     return 0;
39 
40 }

C語言實現左旋字符串