Problem C: 克隆人来了!

    xiaoxiao2021-03-26  7

    Problem C: 克隆人来了!

    Time Limit: 1 Sec   Memory Limit: 128 MB Submit: 896   Solved: 507 [ Submit][ Status][ Web Board]

    Description

    克隆技术飞速发展,克隆人已经成为现实了!!所以,现在由你来编写一个Person类,来模拟其中的克隆过程。这个类具有2个属性:name——姓名(char*类型),和age——年龄(int类型)。

    该类具有无参构造函数(人名为“no name”,年龄是0)、带参数构造函数、拷贝构造函数以及析构函数外,还有以下3个成员函数:

    1. void Person::showPerson():按照指定格式显示人的信息。

    2. Person& Person::setName(char *):设定人的姓名。

    3. Person& Person::setAge(int):设定人的年龄。

    Input

    输入分多行,第一行是一个正整数N,表示其后有N行输入。每行分两部分:第一部分是一个没有空白符的字符串,表示一个人的姓名;第二部分是一个正整数,表示人的年龄。

    Output

    呃~比较复杂,见样例吧!注意:要根据样例编写相应函数中的输出语句,注意格式哦!

    Sample Input

    3 Zhang 20 Li 18 Zhao 99

    Sample Output

    A person whose name is "no name" and age is 0 is created! A person whose name is "Tom" and age is 16 is created! A person whose name is "Tom" and age is 16 is cloned! A person whose name is "Zhang" and age is 20 is created! This person is "Zhang" whose age is 20. A person whose name is "Zhang" and age is 20 is erased! A person whose name is "Li" and age is 18 is created! This person is "Li" whose age is 18. A person whose name is "Li" and age is 18 is erased! A person whose name is "Zhao" and age is 99 is created! This person is "Zhao" whose age is 99. A person whose name is "Zhao" and age is 99 is erased! This person is "Zhao" whose age is 18. This person is "no name" whose age is 0. A person whose name is "Zhao" and age is 18 is erased! A person whose name is "Tom" and age is 16 is erased! A person whose name is "no name" and age is 0 is erased!

    HINT

    注意:输出中有“”!

    Append Code

    #1:用到了拷贝构造函数,形参为一个对象的引用; #2:同样的类成员可以互相赋值,像该题的name如果用strcpy函数就会出现运行错误。 #3:Person& setName(char *p)和Person& setAge(int p)的返回值类型为Person的引用,如果不加引用符号会出现未知错误(不懂其原因)。  #4:输出双引号需要加"\"符号,和c语言相同。 代码如下: #include<iostream> #include<cstring> using namespace std; class Person { private: char *name; int age; public: Person():name("no name"),age(0){cout<<"A person whose name is "<<"\""<<"no name"<<"\""<<" and age is "<<0<<" is created!"<<endl;} Person(char *x,int y):name(x),age(y){cout<<"A person whose name is "<<"\""<<name<<"\""<<" and age is "<<age<<" is created!"<<endl;} Person(const Person &p){name =p.name;age=p.age;cout<<"A person whose name is "<<"\""<<name<<"\""<<" and age is "<<age<<" is cloned!"<<endl;} void showPerson(){cout<<"This person is "<<"\""<<name<<"\""<<" whose age is "<<age<<"."<<endl;} Person& setName(char *p){name=p;return*this;} Person& setAge(int p){age=p;return *this;} ~Person(){;cout<<"A person whose name is "<<"\""<<name<<"\""<<" and age is "<<age<<" is erased!"<<endl;} }; int main() { int cases; char str[80]; int age; Person noname, Tom("Tom", 16), anotherTom(Tom); cin>>cases; for (int ca = 0; ca < cases; ca++) { cin>>str>>age; Person newPerson(str, age); newPerson.showPerson(); } anotherTom.setName(str).setAge(18); anotherTom.showPerson(); noname.showPerson(); return 0; }
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