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

Examine Preprocessed Source in Visual Studio

Visual Studio offers various methods to examine the preprocessed source code of C/C files. Let's delve into the available options:

Command Line Interface (cl.exe)

The command line interface to Microsoft Visual C , cl.exe, provides three distinct options for outputting the preprocessed file:

1. /E: Preprocesses the file to standard output (similar to GCC's -E option).
2. /P: Preprocesses the file to a specified file.
3. /EP: Preprocesses the file to standard output, excluding #line directives.

Combining Options

If you want to preprocess to a file without #line directives, a combination of the /P and /EP options can be used. For instance:

In this example, the preprocessed file without #line directives will be created with the same name as the source file but with a .i extension.

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