34 lines
660 B
C++
34 lines
660 B
C++
/**
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* @file interesting_facts2.cpp
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* @brief 抽象类类型的指针和引用
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* @author 光城
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* @version v1
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* @date 2019-07-20
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*/
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#include <iostream>
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using namespace std;
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/**
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* @brief 抽象类至少包含一个纯虚函数
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*/
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class Base {
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int x;
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public:
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virtual void show() = 0;
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int getX() { return x; }
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};
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class Derived : public Base {
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public:
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void show() { cout << "In Derived \n"; }
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Derived() {}
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};
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int main(void) {
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// Base b; //error! 不能创建抽象类的对象
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// Base *b = new Base(); error!
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Base *bp = new Derived(); // 抽象类的指针和引用 -> 由抽象类派生出来的类的对象
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bp->show();
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return 0;
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}
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