访问变量值使用C ++中表示变量名称的字符串

如果标题不清楚，我将尝试澄清我的问题：

If the title was not clear, I will try to clarify what I am asking:

想象一下，我有一个变量名为 counter 我知道我可以看到它的当前值，通过做如下：

Imagine I have a variable called counter, I know I can see its current value by doing something like:

std::cout << counter << std::endl;

但是，假设我有很多变量，我不知道我要去哪里直到运行时。

However, assume I have lots of variables and I don't know which I'm going to want to look at until runtime.

有人知道我可以通过使用它的名称来获取变量的值的方式，例如：

Does anyone know a way I can fetch the value of a variable by using its name, for example:

std::cout << valueOf("counter") << std::endl;

我觉得能够做到这一点可能会使大型复杂项目的调试更容易。

I feel being able to do this might make debugging large complex projects easier.

预先感谢您的时间。

更新：提供的所有答案是有效和有用的，但是要点是C ++中不存在反射（并且在阅读链接后建议清楚为什么）。

Update: All the answers provided are valid and useful, however the main point is that reflection does not exist in C++ (and after reading the link recommended it is clear why).