class demo

最新推荐文章于 2023-07-14 16:23:00 发布

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#include <string>
class Person {
public:
    Person(std::string name, std::string address);
    std::string get_name() const {return _name;}
    std::string get_address() const {return _address;}
private:
    std::string _name;
    std::string _address;
};

Person::Person(std::string name, std::string address)
: _name(name), _address(address)
{
}

#include <iostream>
using namespace std;
int main()
{
    Person p("Bob", "New York");
    cout << p.get_name() << '\n' << p.get_address() << endl;
    return 0;
}

=> add default constructor

#include <string>
class Person {
public:
    Person(std::string name, std::string address);
    Person() = default;
    std::string get_name() const {return _name;}
    std::string get_address() const {return _address;}
private:
    std::string _name;
    std::string _address;
};

Person::Person(std::string name, std::string address)
: _name(name), _address(address)
{
}

#include <iostream>
using namespace std;
int main()
{
    Person p;
    cout << p.get_name() << '\n' << p.get_address() << endl;
    return 0;
}