Difference in including the .cpp file and .h file (with the same content in cpp)?

Question

I\'ve recently started learning cpp from basics and was very much confused with the folowing:

Lets say I have a header( test.h which contains only decla

Answer 1

#include just does a copy-n-paste of the file you include into the current file. What the file is named doesn't matter one bit - you can name it "foo.exe" if you like; as long as it contains valid source-code in the context where it is included all is well (but please don't use unconventional names, you'll just confuse people).