派生类调用基类构造函数

cppp531.cpp

#include <iostream>
using namespace std;


class base
{
public:
	base(){};
	base(int i):base_(i){};
public:
	int base_;
};

class inher:public base
{
public:
	inher(){};
	inher(int a,int b):base(8),a(a),b(b){};//如果没有base(8)，则base_执行默认初始化，产生未定义行为
public:
	int a;
	int b;
public:
	void display(){cout<<a<<" "<<b<<" | "<<base_<<endl;};

};

int main(int argc, char const *argv[])
{
	inher i(1,2);
	i.display();
	return 0;
}