Here''s a quicky. In C, what does the extern keyword signify? Does it have any meaning in C++? Thnx

This means the linker should look for a variable in another object file.

Example:

// In test1.cpp
int test = 123;

// In test2.cpp
extern int test;

There are other uses of extern though, like to force the compiler to use c linkage in c++ files.

// In some c++ file
extern "C"
{
void MyFunc (int i);
}

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