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Sorry for the what I am sure is a basic question, but I must not be using the right terms when searching for an answer with code that has hundreds of header files. Simply searching the files for #define statements is tedious. Is there an easy way in Visual Studio or VSCode to just have it step through the files and give me a list of all values literals and their values?
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Header files are not compiled directly, Instead, header files are included into other source files via #include . In fact, when you invoke a C/C++ compiler, before the “real” compiler starts, it runs a pre-processor whose job is to handle the special instructions that begin with # .
To check if an header file has been included or not in a C or C++ code, we need to check if the macro defined in the header file is being defined in the client code. Standard header files like math. h have their own unique macro (like _MATH_H ) which we need to check. Consider this example of checking if math.
Header files are used in C++ so that you don't have to write the code for every single thing. It helps to reduce the complexity and number of lines of code. It also gives you the benefit of reusing the functions that are declared in header files to different .
A header file is a file with extension . h which contains C function declarations and macro definitions to be shared between several source files. There are two types of header files: the files that the programmer writes and the files that comes with your compiler.
The closest you can get is to use the /P compiler switch to dump the preprocessed output to a file. It's going to be pretty huge, but it shows you precisely what the compiler is working with, and you can do a text search in the output file to find what you're looking for.
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