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给出下面程序的输出结果。

#include ﹤iostream﹥

#include ﹤string﹥

using namespace std;

class Book {

char*title;char*author;

int numsold;

public:

Book( ){ }

Book(const char*str1, const char*str2, const int num) {

int len=strlen(str1);

title=new char[1en+1];

strcpy(title, strl);

len=strlen(str2);

author=new char[1en+1];

strcpy(author, str2);

numsold=num; }

void sethook(const char * strl, const char * str2, const int num) {

int len=strlen(strl);

title=new char[1en+1];

strcpy(title, strl);

len=strlen(str2);

author=new char[1en+1];

strcpy(author, str2);

numsold=num;

}

~Book( ) {

delete title;

delete author;

}

void print(ostream& output) {

output﹤﹤"书名:"﹤﹤title﹤﹤endl;

output﹤﹤"作者:"﹤﹤author﹤﹤endl;

output﹤﹤"月销售量:"﹤﹤numsold﹤﹤endl;}

};

void main( ) {

Book obj1("数据结构","严蔚敏",200),obj2;

obj1.print(cout);

obj2.setbook("C++语言程序设计","李春葆",210);

obj2.print(cout);

}

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