linker cannot find a C++ static member

2018-06-30 22:59:59

This question already has an answer here:

What is an undefined reference/unresolved external symbol error and how do I fix it? 27 answers

You have declared id as a static variable. You then set it in every constructor call, which is probably not what you want to do.

For a 'fix', you can add the following line above main:

int Emp::id = 0;

However, you may not want that to be static. For more information on static class variables, see this page

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