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#include
class Year
{ int y;
static const int InitY=1970;
public:
        Year() {y=InitY;}
        int year() const{ return y;};
        void add_year(int i){y=year()+i;};
};
int main()
{
        Year y1;
        Year * const py1=new Year();
        y1.add_year(1);
        py1->add_year(2);
        cout<year()<         return 0;
}
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Compiling...
11.cpp
E:\1\11.cpp(4) : error C2258: illegal pure syntax, must be '= 0'
E:\1\11.cpp(4) : error C2252: 'InitY' : pure specifier can only be specified for functions
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