副本构造并不＃39;T工作时定义对象与quot;=quot;符（复制初始化）

代码:

#include <iostream>

using namespace std;

 

class String

{

 

	char name[256];

public:

 

	String(char* str)

	{

		cout<<"Constructor" << endl;

		strcpy(name,str);

	}

 

	String(String &s)

	{

		cout<< "Copy Constructor"<< endl;

		strcpy(name,s.name);

	}

 

	String()

	{

		cout<<"Default Constructor"<<endl;

	}

 

	 String(){}

 

	String& operator=(const String&s)

	{

		strcpy(name,s.name);

		cout<<"Assign Operator"<<endl;

		return *this;

	}

 



	void display()

	{

		cout << "The String is:" << name << endl;

	}

};

 



int main()

{

	String mystr1 = "a";//Why does it only print "Constructor"?

	String mystr2;

	mystr2 = "aa";

	String mystr3("aaa");//Here just invoke String::String(char *str).

	return 0;

}