( 12 )请将下面的程序补充完整,使得程序输出 “ 飘是张娜的书 ” 。#include iostreamusing namespace std;class Book{public:Book(char *str) {strcpy(title,str);}【 12 】 void PrintInfo() {couttitleendl;}protected:char title[50];};class MyBook:public Book{public:MyBook(char *s1,char *s2= " 张娜 " ):【 13 】 {strcpy(owner,s2);}virtual void PrintInfo() {couttitle " 是 " owner " 的书 " endl;}private:char owner[10];};int main(){Book *prt=new MyBook( " 飘 " );prt-PrintInfo();return 0;}

( 12 )请将下面的程序补充完整,使得程序输出 “ 飘是张娜的书 ” 。

#include <iostream>

using namespace std;

class Book{

public:

Book(char *str) {strcpy(title,str);}

【 12 】 void PrintInfo() {cout<<title<<endl;}

protected:

char title[50];

};

class MyBook:public Book{

public:

MyBook(char *s1,char *s2= " 张娜 " ):

【 13 】 {strcpy(owner,s2);}

virtual void PrintInfo() {cout<<title<< " 是 " owner<< " 的书 " <<endl;}

private:

char owner[10];

};

int main(){

Book *prt=new MyBook( " 飘 " );

prt->PrintInfo();

return 0;

}


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