How Can I View Preprocessed C/C Code in Visual Studio?

How to View Preprocessed C/C Source Files in Visual Studio

Have you ever wanted to see how a C/C source file transforms after preprocessing? Visual Studio provides several options for inspecting the preprocessed code.

In Visual Studio's command line interface, cl.exe, you have three choices:

1. Preprocess to Standard Output (/E)

Similar to GCC's -E option, this command outputs the preprocessed file to the standard output.

2. Preprocess to File (/P)

This command writes the preprocessed file to a specified file.

3. Preprocess to Standard Output Without #line Directives (/EP)

This command outputs the preprocessed file to the standard output but omits #line directives.

To preprocess without #line directives and save the output to a file, combine the /P and /EP options.

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