This is the error I receive.
I created the Connected Component Class , with it's header
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Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. – Community Mar 30 '22 at 14:08
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Please [edit] your question to provide an [mcve], as text in the question (use the code formatting tool), not as an image. – Mat Mar 30 '22 at 14:10
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We can't really help. Other than closing your question for one that tries to help resolve all undefined reference errors. – drescherjm Mar 30 '22 at 14:10
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If you are using VSCode remember that by default it only builds the active file into your executable. The documentation @ github explains how to modify your tasks.json to allow for building more than 1 source file. – drescherjm Mar 30 '22 at 14:12