////  1120 全排列.cpp//  Jobdu////  Created by PengFei_Zheng on 23/04/2017.//  Copyright © 2017 PengFei_Zheng. All rights reserved.// #include <stdio.h>#include <iostream>#include <algorithm>#include <string.h>#include <cmath>#define MAX_SIZE 7 using namespace std; char str[MAX_SIZE];char ans[MAX_SIZE];bool used[MAX_SIZE];int len; void prem(int x){    if(x == len){        ans[x]=‘\0‘;        printf("%s\n",ans);        return;    }    for(int i = 0 ; i < len ; i++){        if(!used[i]){            used[i] = true;            ans[x] = str[i];            prem(x+1);            used[i]=false;        }    }}int main(){    while(scanf("%s",str)!=EOF){        memset(used,false,sizeof(used));        len = (int)strlen(str);        prem(0);        printf("\n");    }    return 0;}/**************************************************************    Problem: 1120    User: zpfbuaa    Language: C++    Result: Accepted    Time:440 ms    Memory:1520 kb****************************************************************/