ANSI 2.1.1.3 How a diagnostic is identified
Microsoft C produces error messages in the form:
filename( line-number ) : diagnostic Cnumber message
where filename is the name of the source file in which the error was encountered; line-number is the line number at which the compiler detected the error; diagnostic is either “error” or “warning”; number is a unique four-digit number (preceded by a C, as noted in the syntax) that identifies the error or warning; message is an explanatory message.