C++11继承构造函数

#include 
class Base {
public:
	Base(int v) : _value(v), _c('0') {}
	Base(char c) : _value(0), _c(c) {}

	int _value;
	char _c;
};

class Derived : public Base {
public:
	// 初始化基类需要透传参数至基类的各个构造函数，非常麻烦
	//Derived(int v) :Base(v) {}
	//Derived(char c) :Base(c) {}
	//using Base::Base;
	// 假设派生类只是添加了一个普通的函数
	void display() {
		std::cout <<"_c = "<< this->_c << std::endl;
		std::cout << "_value = " << this->_value << std::endl;
		std::cout << "b = "<_b << std::endl;
	}
	Derived(int b,int v):_b(b),Base(v){}
	int _b;
};

int main() {
	Derived d(4,5);
	d.display();
}