hero是可数名词还是不可数名词

hero用作名词的用法例句：

The hero smote the giant with his sword.英雄用剑猛劈巨人。

He is the hero of an old legend.他是一个古老传说中的英雄。

They say the hero is played by Tom Cruise.据说男主角是汤姆·克鲁斯。