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若有以下程序: #include<iostream> usingnamespacestd; classBase {public: Base() {x=0;} intx;}; classDerivedl:virtualpublicBase {public: Derivedl() {x=10;}}; classDerived2:virtua11publicBase {public: Derived2() {x=20;}}; classDerived:publicDerivedl,protectedDerived2{};intmain() {Derivedobj; cout<<obj.x<<endl; return0;} 该程序运行后的输出结果是( )。

A.20

B.30

C.10

D.0


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更多 “ 若有以下程序: #includeiostream usingnamespacestd; classBase {public: Base() {x=0;} intx;}; classDerivedl:virtualpublicBase {public: Derivedl() {x=10;}}; classDerived2:virtua11publicBase {public: Derived2() {x=20;}}; classDerived:publicDerivedl,protectedDerived2{};intmain() {Derivedobj; coutobj.xendl; return0;} 该程序运行后的输出结果是( )。A.20B.30C.10D.0 ” 相关考题
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