Easily comment (C++) code in vim

Question

I have looked at the following question:

How to comment out a block of Python code in Vim

But that does not seem to work for me. How do I comment code easily wit

Answer 1

Use ctrl-V to do a block selection and then hit I followed by //[ESC].

Alternatively, use shift-V to do a line-based select and then type :s:^://[Enter]. The latter part could easily go into a mapping. eg:

:vmap // :s:^://

Then you just shift-V, select the range, and type // (or whatever you bind it to).