// http://i...content-available-to-author-only...e.com/dSiqXY
//  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)
{
    strcpy(res_d[res_i++], p);  // 蓄える
}
 
// 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, j;
 
    res_i = 0;
    narabe(d, strlen(d));
    for (i = 0; i < res_i; i++) {
        for (j = 0; j < i; j++) {
            if (0 == strcmp(res_d[i], res_d[j])) {
                j = -1;         // jを重複発見フラグに使う
                break;
            }
        }
        if (j >= 0)
            printf("%s\n", res_d[i]);
    }
 
    return 0;
}

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