#include<iostream.h>
class a
{
   
public:
    operator double()const;
    a();
    int dz;
    int mz;
};
a::a()
{
    mz = 1;
    dz = 2;
}

a::operator double()const
{
    return mz * 1.0 / dz;
}

int main()
{
    a zz;
    double s = zz;
    cout<<s<<endl;
    return 0;
}