c++ 深拷贝 浅拷贝

需要注意，在C++的类定义中，有赋值构造函数和拷贝构造函数。所以在执行A b=a操作时，会重新分配空间，属于深赋值。

 cout<<"vector是对象，深赋值"<<endl;
    vector<string> a={"a","f","g"};
    vector<string> b =a;
    b[2] = "kk";
    for(int i = 0; i < 3; i++){
        cout<<a[i];
     
    }
    cout<<endl;
    for(int i = 0; i < 3; i++){
        cout<<b[i];
        
    }
    cout<<endl;
    cout<<"string是对象，深赋值"<<endl; //注意d和c的首地址不一样，但d==c时为true
    string c = "string";
    string d = c;
    d[2] = 'p';
    cout<<c<<","<<d;
    cout<<endl;
    cout<<"char*，浅赋值:"<<endl;
   // char *e = new char[3];
    const char * temp = c.c_str();
    char *e  = const_cast<char*>(temp);
    char *f = e;
    *(++f) = 'h';
    cout<< e <<","<<f;
    cout<<endl;

结果：

vector是对象，深赋值
afg
afkk
string是对象，深赋值
string,stping
char*，浅赋值:
shring,hring