crocodiles have four chambered heart but are still reptiles. give reason?

Hi,

Animals are classified into different phylum according to many features not on the basis of single similarity.

Crocodiles have been classified as reptiles in spite of having four chambered heart because they have dry, non glandular skin, epidermal scales are also present. They are cold blooded,oviparous, etc. All these features are specific for reptiles, so crocodiles are reptiles.