定义和赋值的区别 构造函数和拷贝构造函数

type a;
type b=a; //调用拷贝构造函数
type d(a); //调用拷贝构造函数

type c;
c=a ;    //赋值语句,调用默认构造函数,重载=,改变行为.

class ClsA
{
public: 
        char* Name;
        bool Sex;

        ClsA(char* v,bool sex)
        {
            cout<<"构造函数"<<endl;
            if(v)
            {
                Name = new char[strlen(v)+1];
                strcpy(Name,v);

            }
            else
            {
                Name = NULL;
            }
            Sex = sex;
            
        }

        ~ClsA()
        {
            cout<<"析构函数"<<endl;
            delete[] Name;
        }

        ClsA(const ClsA & A)
        {
            cout<<"拷贝构造函数"<<endl;
        
            if(A.Name)
            {
                Name = new char[strlen(A.Name)+1];
                strcpy(Name,A.Name);
            }
            else
            {
                cout<<"A.Name is NULL";
            }
            Sex = A.Sex;
        }

    //    ClsA& operator = (const ClsA& R)
    //    {
    //        cout<<"operator : ="<<endl;
    //        delete[] Name;
    //        if(R.Name)
    //        {
    //            Name = new char[strlen(R.Name)+1];
    //            strcpy(Name,R.Name);
    //        }
    //        else
    //        {
    //            cout<<"R.Name is NULL";
    //        }
    //        Sex = R.Sex;
//
    //        return *this;
//
    //    }

};