Creating .I file in C [closed]

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Sir pls tell me how to create .I file (extended source file) in c

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A common way to create files in C is with the fopen() function.

#include <stdio.h>

FILE *handle;
handle = fopen("extended.I", "w");
if (handle != NULL) {
    /* ... */
    fclose(handle);
}

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Terribly vague question, but it sounds like you are using Visual Studio. Right-click your project, Properties, C/C++, Preprocessor, change "Generate Preprocessed File" to Yes.

After you rebuild, you'll get the .i files with the preprocessor output in your project directory.

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arsane's comment is the correct response if you are on Linux. "To expand the macro, you can try

gcc -E -o main.I main.c

"

When using the gcc compiler system, it is possible to halt the compiler system at particular phases by using compiler flags. -E for .i files, -S for .s files (an assembly language version of the program)

From the gcc man page:

  -E  Stop after the preprocessing stage; do not run the compiler proper.
       The output is in the form of preprocessed source code, which is
       sent to the standard output.

       Input files which don't require preprocessing are ignored.

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The following command will create a .i file from a .c file

cc -E main.c -o main.i