C++实现细菌含量检测与能量波级别选择程序

```cpp #include <iostream> using namespace std; int main() { int x; cin >> x; // 🦠 根据细菌含量选择能量波级别 if (x <= 20) { cout << "A" << endl; } else if (x > 20 && x <= 40) { cout << "B" << endl; } else if (x > 40 && x <= 60) { cout << "C" << endl; } else if (x > 60) { cout << "D" << endl; } return 0; } ``` ######[AI问答 | 154点数解答 | 2026-04-24 19:25:55]