ini.h
#pragma once
extern int w = 800;
main.cpp
#include "ini.h"
int main()
{
cout<<w;
}
Error: LNK2005 "int w" (?w@@3HA) уже определен в main.obj
what is problem?
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Because you didn't define your variable in a specific compilation unit. – πάντα ῥεῖ May 08 '22 at 17:17
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Hi! this should answer your question: https://stackoverflow.com/questions/10046485/error-lnk2005-already-defined – smabrar May 08 '22 at 17:18
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Emm...don't use extern if you're defining your variable in your header file (which I don't recommend)? – Asphodel May 08 '22 at 17:19