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36 lines
720 B
36 lines
720 B
3 years ago
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/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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extern double sqrt(double);
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extern double pow(double, double);
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class Form {
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private:
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double area;
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public:
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int color;
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virtual void vmethod() {}
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double getArea() { return this->area; }
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void setArea(double area) { this->area = area; }
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};
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class Circle : public Form {
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public:
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void vmethod() override {}
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double getRatio() {
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double a;
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a = getArea();
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return sqrt(a / 2 * 3.14);
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}
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void setRatio(double diameter) { setArea(pow(diameter * 0.5, 2) * 3.14); }
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bool isDark() { return (color > 10); }
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};
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