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Re: [PROGRAMMERING] C++ og adgang til variable i klassen



Hej

Jeg har fundet fejlen. Viste sig at MyB paa anden vis var blevet erklaeret som class CA, hvilket jo forklarer det hele. Beklager ulejligheden.

P.

Peter Maersk-Moller wrote:
Hej

Jeg har nogle problemer med at faa adgang til variable i en klasse.

Jeg har foelgende to klasser

class CA {
public:
  CA() {}
  ~CA() {}
  int x;
private:
  int y;
};

class CB : public CA {
public:
  CB() {}
  ~CB() {}
  int z;
private:
  int w;
};

Saa har jeg koden

void Test(CB* MyB) {

    // OK
    MyB->x = 1;

    // Ikke OK. y er private.
    MyB->y = 1;

// Burde vaere OK, men
MyB->z = 1;
// Compiler siger : 'class CA' has no member named 'z'
}
1) Hvorfor siger compileren 'class CA' naar MyB er en pointer til class CB?


2) Hvorfor kan jeg ikke faa adgang til z ?

3) Hvad goer man saa ? (Ikke saa smart at aendre en hel masse i class CA.)

mvh.

Peter



 
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