C++实现前n个正整数全排列输出及n从1到9运行时间观察

```cpp #include <iostream> #include <algorithm> using namespace std; int main() { int n; cin >> n; int nums[n]; for (int i = 0; i < n; i++) { nums[i] = i + 1; } do { for (int i = 0; i < n; i++) { cout << nums[i]; } cout << endl; } while (next_permutation(nums, nums + n)); return 0; } ``` ######[AI写代码神器 | 257点数解答 | 2024-11-19 15:08:14]