题目内容

读程序，写结果#includeusingnamespacestd;classA{public:virtualvoidf(){cout<<"A"; };};classB:publicA{public:voidf(){cout<<"B"；}};classC:publicB{public:voidf(){cout<<"C";}};intmain(){A*p，a;Bb;C c；a=b;a.f();a=c;a.f();p=&b;p->f();p=&c;p->f();return 0；}

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