Dynamic link error when trying to run MinGW compiled C++ code

Question

I've done some googling and everything already but none of the solutions online exactly match my situation. So I have one project which has the files

• Main.cpp

• BankAccount.hpp

• BanckAccount.cpp

• GoCardAccount.hpp

• GoCardAccount.cpp

And when I compile it, it is completely fine. But running it gives me the following image:

The things I have tried:

1. Reinstalling MinGW
2. Putting the libstdc++6.dll in System32
3. (The only thing that works) putting the libstdc++6.dll in the project directory.

I feel like this is not the best option. Especially since if I write a small "Hello World" program, then the error does not appear.

Is there any way of actually fixing this?