// This illustrates the danger of self-assignment.  That is, when an
// object is assigned to itself, you’ve got to be careful in operator=,
// or you might destroy your data before you copy it to yourself.
//
// This lame class stores a C-style string.

#include <iostream>
#include <cstring>		// for strdup() (not ANSI, but POSIX)

using namespace std;

class Str {
  public:
    Str(const char *rhs) { assign(rhs); }
    Str(const Str &rhs) { assign(rhs.data); }
    Str& operator=(const Str &rhs) { assign(rhs.data); return *this; }
    ~Str() { delete[] data; }
    const char *get() const { return data; }
  private:
    void assign(const char *newval) {
	delete[] data;			// Deallocate current value
	data = strdup(newval);		// Allocate memory; copy chars
    }
    const char *data = nullptr;
};

int main() {
    Str a="♔♕♖♗♘♙", b("♚♛♜♝♞♟");
    cout << a.get() << ' ' << b.get() << '\n';
    a = b;
    cout << a.get() << ' ' << b.get() << '\n';
    a = a;
    cout << a.get() << ' ' << b.get() << '\n';
    return 0;
}