How to open a file with relative path in C++?

Question

I am writing test cases right now and I created some test files which I try to read. The absolute path is:

/home/user/code/Project/source/Project/components/Proj         


        

Answer 1

What you are using is not at all a relative path. Sure you are using the relative path syntax but not the actual meaning of what it is.

/../../../../../../source/Project/components/Project/test/file.dat

This path starts with a / which means root then finds it parent which return root again since root has no parent and goes on... The simplified version of this is:

/source/Project/components/Project/test/file.dat

So it will look for folder source in root which of-course doesn't exist.

What you should do is something like this (assuming your code is in project folder):

./test/file.dat

or if it is in some other folder within Project folder you can do something like this:

../test/file.dat

../ take you to the parent of your current code directory which under this case's assumption is Project.