哪位大神给我讲讲！具体说下过程，学到类与对象就看不下去了

#include<iostream>
#include<string.h>
using namespace std;
class CName
{
public:
CName()
{
strName=NULL;
}
CName(char *str)
{
strName=(char*)new char[strlen(str)+1];
strcpy(strName,str);
}
~CName()
{
if(strName) delete []strName;
strName=NULL;
}
char *getName()
{
return strName;
}
private:
char*strName;
};
int main()
{
char*=new char[5];
strcpy(p,"DING");
CName one(p);
delete []p;cout<<one.getName()<<endl;
return 0;}