改進(jìn)了一下，C++不止這些，這些都是十分基礎(chǔ)的（再抽象點(diǎn)）

原代碼:

```C++

#define BEGIN {

#define END }

#define ZERO 0

#include <iostream>

#include <functional>

using namespace std;

int main()

BEGIN

int n;

cin >> n;

int sum = 0;

int i = n;

code:

auto _BaDd_ = [](auto self, int a, int b) -> int BEGIN

if (!a)

return b;

return self(self, (a & b) << 1, a ^ b);

END;

using std::placeholders::_1;

std::function<int(int)> _INcReMeNt_ = std::bind(_BaDd_, _BaDd_, sum, _1);

sum = _INcReMeNt_(i);

if(i --> 9) goto code;

cout << sum << '\n';

return ZERO;

END

```

濃縮(本來想弄成一些符號(hào)的):

```C++

#define BEGIN {

#define END }

#define ZERO 0

#include <iostream>

#include <functional>

int main() BEGIN int n;std::cin >> n;int sum = 0;int i = n;code: auto _BaDd_ = [](auto self, int a, int b) -> int BEGIN if (!a) return b; return self(self, (a & b) << 1, a ^ b); END; using std::placeholders::_1; std::function<int(int)> _INcReMeNt_ = std::bind(_BaDd_, _BaDd_, sum, _1); sum = _INcReMeNt_(i); if(i --> 9) goto code; std::cout << sum << '\n'; return ZERO; END

```

C++的東西還是挺多的，這里我就隨便弄了幾個(gè)好玩的進(jìn)去

（說起來b站怎么插入代碼塊？似乎不可以？）