设计Person类，成员数据包含姓名（char name[40]）年龄（int age）。 程序的功能：首先读入n个人的姓名和年龄，然后统计所有人的年龄总和；最后计算所有人的平均年龄并输出。 main函数已给定，提交时只需要提交main函数外的代码部分。 #include<iostream> #include<cstring> using namespace std; //你提交的代码在这里 int main() { int n,i; cin>>n; Person *person=new Person[n+1]; for(i=1;i<=n;i++) cin>>person[i]; for(i=0;i<=n;i++) cout<<person[i]<<endl; for(i=1;i<=n;i++) person[0]=person[0]+person[i]; cout<<"average age:"<<person[0].GetAge()/(double)n<<endl; delete[] person; return 0; }输入5 Alice 24 Tom 32 White 26 Jack 27 Allen 18输出name=NULL,age=0 name=Alice,age=24 name=Tom,age=32 name=White,age=26 name=Jack,age=27 name=Allen,age=18 average age:25.4请补充完整代码

#include<iostream>
#include<cstring>
using namespace std;

class Person {
private:
    char name[40];
    int age;
public:
    Person() {
        strcpy(name, "NULL");
        age = 0;
    }
    friend istream& operator>>(istream& in, Person& p);
    friend ostream& operator<<(ostream& out, const Person& p);
    Person operator+(const Person& p) const {
        Person res;
        res.age = age + p.age;
        return res;
    }
    int GetAge() const {
        return age;
    }
};

istream& operator>>(istream& in, Person& p) {
    in >> p.name >> p.age;
    return in;
}

ostream& operator<<(ostream& out, const Person& p) {
    out << "name=" << p.name << ",age=" << p.age;
    return out;
}

int main() {
    int n, i;
    cin >> n;
    Person* person = new Person[n + 1];
    for (i = 1; i <= n; i++)
        cin >> person[i];
    for (i = 0; i <= n; i++)
        cout << person[i] << endl;
    for (i = 1; i <= n; i++)
        person[0] = person[0] + person[i];
    cout << "average age:" << person[0].GetAge() / (double)n << endl;
    delete[] person;
    return 0;
}