This option specifies that Filename is a C source file, even if it does not have the extension .c. The space between the option and the Filename argument is optional.
/TC is a global variant of /Tc that specifies all files named on the command line should be treated as C source files, without regard to ___location on the command line in relation to the option.
If this option does not appear, the compiler assumes that files with the .c extension are C source files; files with the .cpp or the .cxx extension are C++ source files.
If you need to specify more than one source file with an extension other than the default (.c, .cpp), you must specify each file with the appropriate command-line option (/Tc or /Tp).
See Also
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