Error: infinite loop in my code(Depth First Search)

[Loosexll]

The first thing I notice is that you have "++v" in the declaration of your For loop. It should be "v++"

I'm just glancing over your code, but that error could be preventing the incrementation of the v variable, which would cause the infinite loop.

No, not wrong this, can you test on your VS and tell me something else???