Ray's playground

摘要： Both classes and templates support interfaces and polymorphism. For classes, interfaces are explicit and centered on function signatures. Polymorphism occurs at runtime through virtual functions. For template parameters, interfaces are implicit and based on valid expressions. Polymorphism occurs du. 阅读全文

摘要： Multiple inheritance is more complex than single inheritance. It can lead to new ambiguity issues and to the need for virtual inheritance. Virtual inheritance imposes costs in size, speed, and complexity of initialization and assignment. It's most practical when virtual base classes have no data 阅读全文

摘要： 1importsys23classOutput:4def__init__(self):5self.text=''6defwrite(self,string):7self.text+=string8defwritelines(self,lines):9forlineinlines:10self.write(line)1112classInput:13def__init__(self,input=''):14self.text=input15defread(self,size=None):16ifsize==None:17res,self.text=self.tex 阅读全文