86 lines
2.0 KiB
C++
86 lines
2.0 KiB
C++
#include <iostream>
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#include <map>
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#include <string>
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class Student {
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public:
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static std::map<int, Student *> id2student;
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static std::map<std::string, Student *> name2student;
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enum class Gender { Boy, Girl };
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private:
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int id;
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std::string name;
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int age;
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Gender gender;
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public:
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// 从输入流构造
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// 输入格式与输出格式一致
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// 输出函数已给出
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Student(std::istream &is) {
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std::string tmp_gender;
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is >> id >> name >> age >> tmp_gender;
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if (tmp_gender == "boy")
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gender = Gender::Boy;
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else
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gender = Gender::Girl;
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id2student[id] = this;
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name2student[name] = this;
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}
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// 人无法被复制（至少不应该）
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Student(Student const &rhs) = delete;
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Student &operator=(Student const &rhs) = delete;
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// 你需要支持的操作
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Student(Student &&rhs) {
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id = rhs.id;
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name = rhs.name;
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age = rhs.age;
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gender = rhs.gender;
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rhs.id = 0;
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id2student[id] = this;
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name2student[name] = this;
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}
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Student &operator=(Student &&rhs) {
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if ((&rhs) != this) {
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if (id != 0) {
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id2student.erase(id);
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name2student.erase(name);
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}
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id = rhs.id;
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name = rhs.name;
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age = rhs.age;
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gender = rhs.gender;
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rhs.id = 0;
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id2student[id] = this;
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name2student[name] = this;
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}
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return *this;
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}
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~Student() {
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if (id != 0) {
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id2student.erase(id);
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name2student.erase(name);
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}
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}
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Student &rename(std::string const &str) & {
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name2student.erase(name);
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name = str;
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name2student[name] = this;
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return *this;
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}
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Student rename(std::string const &str) && {
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name2student.erase(name);
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name = str;
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name2student[name] = this;
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Student tmp(std::move(*this));
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return std::move(tmp);
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}
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friend std::ostream &operator<<(std::ostream &os, Student &stu) {
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return os << stu.id << ' ' << stu.name << ' ' << stu.age << ' '
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<< (stu.gender == Student::Gender::Boy ? "boy" : "girl");
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}
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}; |