【急求这几道c++题的答案,英文更佳1.WhatdoesinheritancemeaninC++?SupposeyouhaveclassAandclassB,underwhichofthefollowingtwoconditionsclassBshouldinheritfromclass（1）AisapartofB.（2）BisakindofA.2.Whens】

　　急求这几道c++题的答案,英文更佳

　　1.WhatdoesinheritancemeaninC++?SupposeyouhaveclassAandclassB,underwhichofthefollowingtwoconditionsclassBshouldinheritfromclass

　　（1）AisapartofB.

　　（2）BisakindofA.

　　2.Whenshouldthekeywordvirtualbeplacedbeforeamemberfunctionofaclass?Doallofthevirtualmemberfunctionshavetobeoverriddeninthederivedclass?Ifnot,why?

　　3.DoesC++supportmultipleinheritance?Somepeoplethinkthatmultipleinheritancecancauseavarietyofambiguityproblems.Trytoexplainwhatproblemswillmultipleinheritancecauseandhowtoavoidthem.

　　4.WhatoperatorscannotbeoverloadedinC++?Whatrestrictionappliestooverloadingthefollowingoperators?

　　=,(),[],and->.