设有以下定义和程序:#include<iostream.h>class A1{public:void show1(){cout<<class A1<<endl
定义,程序,
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设有以下定义和程序: #include<iostream.h> class A1 { public: void show1() { cout<<"class A1"<<endl; } }; class A2:public A1 { public: void show2() { cout<<"class A2"<<endl; } }; class A3:protected A2 { public: void show3() { cout<<"class A1"<<endl; } }; void main() { A1 obj1; A2 obj2; A3 obi3; } 则以下不合语法的调用语句是()。
A.objl.show1();
B.obj2.show1();
C.obj3.show1();
D.obj2.show2();
请帮忙给出正确答案和分析,谢谢!
