题解 | #全排列#

#include <iostream>
#include <cstring>
using namespace std;

char str[7];
char board[7];
bool isused[7];

void myout(int maxlevel,int now){
    if(maxlevel==now){
        for(int i=0;i<maxlevel;i++){
            if(!isused[i]){
                board[now-1]=str[i];
                cout<<board<<endl;
            }
        }
    }
    else{
        for(int i=0;i<maxlevel;i++){
            if(!isused[i]){
                board[now-1]=str[i];
                isused[i]=true;
                myout(maxlevel,now+1);
                isused[i]=false;
            }
        }
    }
}

int main() {
    cin>>str;
    myout(strlen(str),1);
    system("pause");
    return 0;
}