( 12 )有如下程序:#include iostreamusing namespace stdclass Animal{public:virtual char* getType () const { return "Animal" ; }virtual char* getVoice () const { return "Voice" ; }};Class Dog : public Animal {public:char* getType ( ) const {return "Dog" ; }char* getVoice ( ) const {return "Woof"}};void type ( Animal a ) {couta.getType ( ) ; }void speak ( Animal a ) {couta.getVoice ( ) ; }int main ( ) {Dog d; type ( d ) ; cout" speak" ; speak ( d ) ; coutendi;return 0;}运行时的输出结果是【 12 】 。

( 12 )有如下程序:

#include <iostream>

using namespace std

class Animal{

public:

virtual char* getType () const { return "Animal" ; }

virtual char* getVoice () const { return "Voice" ; }

};

Class Dog : public Animal {

public:

char* getType ( ) const {return "Dog" ; }

char* getVoice ( ) const {return "Woof"}

};

void type ( Animal& a ) {cout<<a.getType ( ) ; }

void speak ( Animal a ) {cout<<a.getVoice ( ) ; }

int main ( ) {

Dog d; type ( d ) ; cout<<" speak" ; speak ( d ) ; cout<<endi;

return 0;

}

运行时的输出结果是【 12 】 。


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