C語言實現左旋字符串

C語言實現左旋字符串

--------------------------------------------------------------------------------------       例如：字符串：AABCD     左旋一個字符為：ABCDA                               左旋兩個字符為：BCDAA ------------------------------------------------------------------------------------------   C語言代碼：  

# include <stdio.h>
# include <stdlib.h>
# include <string.h>

# define MAX 20

void Contra_solem(char *str, int move)
{
    char *pstart = NULL;
    char *pend = NULL;
    char *src = NULL;
    int i = 0;

    pstart = str;
    pend = (str + strlen(str));
    src = str;

    for (i = 0; i < move; i++)
    {
        *pend++ = *pstart++;
     }

    while (pstart <= pend)
    {
        *src = *pstart;
        pstart++;
        src++;
     }
}

int main()
{
    char str[MAX] = "abcdefgh";
    int move = 0;                        

    printf("源字符串為：%s\n",str);

    printf("輸入想要左旋字符的個數：");
    scanf("%d", &move);                

    while (move > strlen(str))
    {
    printf("@@@輸入太大，請重新輸入！@@@\n");
    scanf("%d",&move);
    }

    Contra_solem(str,move);

    printf("左旋%d個字符後的字符串為：%s\n",move,str);

    system("pause");
    return 0;
}