要避免重写派生类的构造函数,可以使用以下解决方法之一:
#include
class Base {
public:
Base(int value) : m_value(value) {
std::cout << "Base constructor called" << std::endl;
}
protected:
int m_value;
};
class Derived : public Base {
public:
Derived(int value) : Base(value) {
std::cout << "Derived constructor called" << std::endl;
}
};
int main() {
Derived d(10);
return 0;
}
输出结果:
Base constructor called
Derived constructor called
#include
class Base {
public:
static Base* createDerived(int value) {
return new Derived(value);
}
protected:
Base(int value) : m_value(value) {
std::cout << "Base constructor called" << std::endl;
}
int m_value;
};
class Derived : public Base {
private:
Derived(int value) : Base(value) {
std::cout << "Derived constructor called" << std::endl;
}
friend class Base;
};
int main() {
Base* b = Base::createDerived(10);
delete b;
return 0;
}
输出结果:
Base constructor called
Derived constructor called
这两种方法可以有效地避免重写派生类的构造函数,根据实际需求选择合适的方法。
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