主要是用next_permutation函数
code:
#include <iostream>
#include <algorithm>
#include <string>
#include <cmath>
using namespace std;
char a[250];
int main()
{
int len;
while(cin>>a)
{
len=strlen(a);
sort(a,a+len);
do
{
cout<<a<<endl;
}while(next_permutation(a,a+len));
}
return 0;
}