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111
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1 typedef double Real;
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2 class Vector {
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3 int dimen;
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4 Real* val;
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5 public:
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6 Vector& operator=(const Vector& vec);
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7 Vector(int p_dimen, Real *p_val)
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8 : dimen(p_dimen), val(p_val) { }
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9 int dim() const;
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10 };
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11 class DVector : public Vector {
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12 public:
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13 void reDim(int newdim);
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14 explicit DVector(const Vector& old);
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15 DVector& operator=(const Vector& vec) {
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16 reDim(vec.dim());
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17 Vector::operator=(vec);
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18 }
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19 };
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20 Vector& Vector::operator=(const Vector& vec)
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21 {
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22 dimen = vec.dimen;
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23 val = vec.val;
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24 }
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25 int Vector::dim() const { return dimen; }
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26 DVector::DVector(const Vector& old) : Vector(0, 0)
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27 {
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28 *this = old;
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29 }
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30 void DVector::reDim(int newdim) {}
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31 int main() {}
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32
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