cats

Question
i havee my cat persian silver and my frined has another persian cat mine is about 2 years and my friends cat is 3 years today 3 september i went to his house and i let my cat with his cat in a closed room alone but nothing happent about 1 hour when i put the cats close to each other they start fighting plz help whats the problem

Answer
I am not clear if you were hoping they would mate?  If so, then I suspect that the girl is not in heat so therefore they are most likely going to fight as they are strangers to each other.

You need to be sure that your girl is in heat at least 2 days and 'treading' with her back feet and putting her tail to one side, before introducing her to the male.

Regards

Marcia