全排列使用 c++ STL

#include <algorithm>
#include<iostream>
#include <string.h>
#include<stdio.h>


using namespace std;


int main (){
   char b[7] ;
   int n;
   while (scanf("%s",b)!=EOF){
    n = strlen(b);
  do{
     printf("%s\n",b);
  }while (next_permutation(b,b+n));
  printf("\n");
  }


  return 0;
}