在 C 中获取变量名的编程方式? [英] Programmatic way to get variable name in C?

问题描述

我正在开发一个工具来从变量中转储数据.我需要转储变量名和值.

I am developing a tool to dump data from variables. I need to dump the variable name, and also the values.

我的解决方案:将变量名存储为字符串，并打印变量名"，然后是其值.

My solution: Store variable name as a string, and print the "variable name", followed by its value.

有没有什么程序化的方式来知道变量名?

Is there any programmatic way to know the variable name?

推荐答案

你可以试试这样的:

#define DUMP(varname) fprintf(stderr, "%s = %x", #varname, varname);

我曾经使用这个标题我写过，当我刚接触 C 时，它可能包含一些有用的想法.例如，这将允许您打印 C 值并在其中提供格式说明符(以及一些附加信息):

I used to use this header I wrote, when I was new to C, it might contain some useful ideas. For example this would allow you to print a C value and provide the format specifier in one (as well as some additional information):

#define TRACE(fmt, var) 
        (error_at_line(0, 0, __FILE__, __LINE__, "%s : " fmt, #var, var))

如果您使用 C++，您可以使用传递值的类型并适当地输出它.如果是这种情况，我可以提供一个更有利可图的示例，说明如何漂亮地打印"变量值.

If you're using C++, you could use the type of the passed value and output it appropriately. I can provide a much more lucrative example for how to "pretty print" variable values if this is the case.

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