写了一个数据库表，求大大看看有什么改进的地方

Question

#include
#include
#include
#include
#include
using namespace std;

class Employee
{
public:
Employee(size_t id = 0, const string& name = " "):_id(id), _name(name){}
size_t getID() const { return _id; }
void print() const { cout << _id << " " << _name << endl; }
private:
size_t _id;
string _name;
};

class IDLess
{
public:
bool operator()(const Employee& lhs, const Employee& rhs) const
{
return lhs.getID() < rhs.getID();
}
};

int main()
{
Employee emp1(2020102344, "张三"), emp2(2020103333, "李四"), emp3(2020103504, "王五");
set<Employee,IDLess> set1;
set1.insert(emp1);
set1.insert(emp2);
set1.insert(emp3);
for_each(set1.begin(), set1.end(), mem_fun_ref(&Employee::print));
}

Answer 1

_id, _name成员 最好生成对应的set, get 方法。