Nice page for shallow copy and deep copy,also other c++ skills

http://www.fredosaurus.com/notes-cpp/oop-condestructors/shallowdeepcopy.html


//--- file Person.h
. . .
class Person {
private:
char* _name;
int _id;
public:
Person& Person::operator=(const Person& p);
. . .
}
//--- file Person.cpp
. . .
//=================================================== operator=
Person& Person::operator=(const Person& p) {
if (this != &p) { // make sure not same object
delete [] _name; // Delete old name's memory.
_name = new char[strlen(p._name)+1]; // Get new space
strcpy(_name, p._name); // Copy new name
_id = p._id; // Copy id
}
return *this; // Return ref for multiple assignment
}//end operator=