C++类中，派生类构造函数后面有初始化列表时，怎样将这个派生类构造函数分为声明和主体部分？

举个例子你就知道了
#include
#include
using namespace std;
class person
{
public:
person(){}
person(string m_name,string m_ID): name(m_name),ID(m_ID) {}
~person(){}
protected:
string name;
string ID;
};

class manager : public person
{
public:
manager(){}
manager(string m_name,string m_ID,string m_department); //声明构造函数
~manager(){}
void display()
{
cout< }
private:
string department;
};

//构造函数实现，用初始化列表的形式 ,调用基类的构造函数来初始化继承的信息
manager::manager(string m_name,string m_ID,string m_department):person(m_name,m_ID),department(m_department)
{

}

int main()
{
manager * m = new manager("张三","201012016","技术部");
m->display();
delete m;
return 0;
}