What is more important while speaking English; a) accent, b) grammar?

The basic foundation of any language is it's grammar. If you are wrong grammatically, the very purpose of language i.e communication, is affected.

While speaking accent... but writing grammar.. 

Grammar is important so that people would understand the thought of what you are saying. On the other hand, accent is very important. A good and clear accent plus good grammar will bring out the best understanding while in a conversation with people.

accent is more impotent then grammar 

Grammar, then accent. It is of no use to speak in such a way that everyone understands you, but your grammar is not in line.

As I have learned in my year of studies the English Grammar is more important.

I think accent because almost one third of the world population speak fluently and even make poem though they can not right even one letter!

I think accent because people are listing to you should take care about your pronunciation but when writing the grammar will be so important

I think first grammar then accent.

 JUST SPEAK ENGLISH  I THINK ACCENT

Grammer