33 lines
649 B
C++
33 lines
649 B
C++
// 下面定义了一个shape抽象类，派生出Rectangle类，用于计算Rectangle类对象的面积Area()。请补充完整下面的程序，使程序输出60。
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#include <cstring>
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#include <iostream>
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using namespace std;
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class Shape {
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public:
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// _________________
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virtual void Area() = 0;
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};
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class Rectangle : public Shape {
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public:
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// _________________
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int width, height;
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Rectangle(int _width, int _height) : width(_width), height(_height) {
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}
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void Area() {
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cout << width * height << endl;
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}
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};
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int main() {
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Shape *sp;
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Rectangle re1(10, 6);
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sp = &re1;
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sp->Area();
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return 0;
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} |