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[CPROG] g++ og pure virtual functions



Jeg har en klasse med nogle

class a
    virtual int vfunc(...)=0;
    ....

class b
    int vfunc();

b::vfunc() {implementering...}

altså pure virtual functions. En nedarvende klasse implementerer alle disse.
Compiler fint med g++, men
når den første funktion kaldes (via en pointer p_b til b, altså
p_b->vfunc()), får jeg en segmentation fault.
Hvad sker der?

Daniel J. Jacobsen




 
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