求助大佬，蒟蒻不知道哪里有问题，测试了很多次

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string>
#include <stdlib.h>
#include <math.h>
#include <vector>
#include <iostream>
#include <algorithm>

using namespace std;


int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0), cout.tie(0);
	int n;
	cin >> n;
	int a[10] = { 0 };
	for (int i = 1; i <= n; i++) {
		a[i] = i;
	}
	do {
		for (int i = 1; i <= n; i++) {
			printf("%5d", a[i]);
		}
		cout << endl;
	} while (next_permutation(a+1, a + n + 1));

	return 0;
}