全排列函数（next_permutation)

#include<cstdio>

#include<cstring>

#include<algorithm>

using namespace std;

int main()

{

    int a[10];

    int n;

    scanf("%d",&n);

    for(int i = 1; i <= n ; i++)

        scanf("%d",&a[i]);

    sort(a+1,a+n+1);

     do{

        for(int i = 1; i < n ;i++)

            printf("%d ", a[i]);

          printf("%d\n", a[n]);

    }

    while(next_permutation(a+1,a+n+1));

 return 0;

}

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