小朋友学C++（5）：构造函数

#include <iostream>
using namespace std;
class Dog
{
public:    
    string name;
    // 无参构造函数 
    Dog()
    {
        cout << "Dog's constructor!" << endl;
    }
    // 有参构造函数 
    Dog(string Name)
    {
        name = Name;
        cout << "Dog's constructor with name!" << endl;
    }
    void run()
    {
        cout << name << " is running..." << endl;
    }
};
int main()
{
    Dog dog1;
    dog1.name = "Wang Cai";
    dog1.run();
    Dog dog2("Xiao Bai");
    dog2.run();
    return 0;
}

Dog’s constructor!
Wang Cai is running...
Dog’s constructor with name!
Xiao Bai is running