// http://i...content-available-to-author-only...e.com/tGdfKa
//  並べ替え
//  重複非表示
 
#include<stdio.h>
#include<string.h>
 
char res_d[4 * 3 * 2 * 1][5];   // 結果貯蔵
int res_i;                      // 結果個数
 
// 並べ替え結果処理
void kekka_shori(char *p)
{
    int i;
    // 重複チェック
    for (i = 0; i <= res_i; i++)
        if (0 == strcmp(res_d[i], p))
            return;
    // 重複無ければ蓄える
    strcpy(res_d[res_i++], p);
}
 
// 文字列の右n桁を左にスライド
void narabe(char *d, int n)
{
    int i, j, len = strlen(d);
    char c;
 
    if (n <= 1) {
        kekka_shori(d);
        return;
    }
    for (j = 0; j < n; j++) {
        narabe(d, n - 1);
        c = d[len - n];
        for (i = 0; i < n - 1; i++)
            d[len - n + i] = d[len - n + i + 1];
        d[len - n + i] = c;
    }
}
 
int main()
{
    char d[] = "aabc";
    int i;
 
    // 初期化
    res_i = 0;
    // 並べ替えデータ作成(重複チェック)
    narabe(d, strlen(d));
    // 表示
    for (i = 0; i < res_i; i++) {
        printf("%s\n", res_d[i]);
    }
 
    return 0;
}

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