35 lines
525 B
C++
35 lines
525 B
C++
/**
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* @file interesting_facts4.cpp
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* @brief 抽象类可以有构造函数
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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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// An abstract class with constructor
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class Base {
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protected:
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int x;
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public:
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virtual void fun() = 0;
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Base(int i) { x = i; }
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};
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class Derived : public Base {
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int y;
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public:
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Derived(int i, int j) : Base(i) { y = j; }
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void fun() { cout << "x = " << x << ", y = " << y; }
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};
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int main(void) {
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Derived d(4, 5);
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d.fun();
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return 0;
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}
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