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Message: <blockquote data-quote="sanzilla jackcat" data-source="post: 12104342" data-attributes="member: 131221">if you asking how the main() is called?And how it works , I can alsogive answers for that.There is a C/C++ runtime library called crt0 , typically implemented as a staticlibrary, and invoked by your compiler when linking and building the final executable unless you exceptionally specified[when youwriting operating system or binary image you could say the compilerto specifically not to use it]. So it have a undefined reference to _main [note thatunderscore comes from the naming conventions].</blockquote>

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