本人在学习C++类的时候遇到这个问题，这段代码执行不了总是有错误怎么破～

#include<iostream>
#include<cstring>
using namespace std;
class Name
{public:
    Name(char*pn);
    Name(const Name &obj);
    ~Name();
    void setName(char *);
    void showName();
    protected:
    char *pName;
    long size;
};
Name::Name(char *pn)
{cout<<"Coustructing"<<pn<<endl;
    pName=new char[strlen(pn)+1];
    if(pName!=0) strcpy_s(pName,strlen(pn)+1,pn);
    size=strlen(pn);
}
Name::Name(const Name &obj)
{cout<<"copying"<<obj.pName<<"into its own block\n";
    pName=new char[strlen(obj.pName)+1];
    if(pName!=0)
        strcpy_s(pName,strlen(obj.pName)+1,obj.pName);
    size=obj.size;
}
Name::~Name()
{cout<<"Destructing"<<pName<<endl;
    pName[0]='\0';
    delete []pName;
    pName=NULL;
    size=0;
}
void Name::setName(char *pn)
{delete []pName;
    pName=new char[strlen(pn)+1];
    if(pName!=0) strcpy_s(pName,strlen(pn)+1,pn);
    size=strlen(pn);
}
void Name::showName()
{cout<<pName()<<endl;
}
int main()
{Name obj1("NoName");
    Name obj2=obj1;
    obj1.showName();
    obj2.showName();
    obj1.setName("sundondpo");
    obj2.setName("DuFu");
    obj1.showName();
    obj2.showName();
}