c++多继承问题，救救孩子吧！！

Question

定义一个员工类Employee，有数据成员姓名，编号。定义一个销售员继承自员工类Sales，工资为销售额的提成10%，定义一个经理类Manager，固定工资8000，定义一个销售经理类，继承自销售员类和经理类，工资为固定工资5000加销售额的提成5%。每个类均有display()函数输出信息，编写主函数测试。主函数中定义一个销售经理对象，销售额为100000，输出信息。

题目已给的代码：

#include  <iostream>
using  namespace  std;
class  Employee
{
public:
        Employee(string  id,string  name):id(id),name(name)
        {}
        void  display()
        {
                cout<<"ID:"<<id<<endl;
                cout<<"Name:"<<name<<endl;
        }
protected:
        string  id,name;
};



int  main()
{
        string  id,name;
        float  sale;
        cout<<"Input  id  name  and  sale:"<<endl;
        cin>>id>>name>>sale;
        if(sale<0)
        {
                cout<<"Input  Error!"<<endl;
                return  0;
        }
        SalesManager  sm(id,name,sale);
        sm.display();
        return  0;
}

我写的中间部分的代码：

1. //定义一个销售员继承自员工类Sales，工资为销售额的提成10%，
   class Sales : virtual public Employee
   {
   public:
   	Sales(string  id, string  name)
   	{
   		this->id = id;
   		this->name = name;
   
   	}
   
   	
   	void display()
   	{
   		cout << "ID:" << id << endl;
   		cout << "Name:" << name << endl;
   		cout << "salary:" << sale*1.1 << endl;
   	}
   protected:
   	float sale;
   
   };
   //定义一个经理类Manager固定工资8000
   
   class Manager :virtual public Employee
   {
   public:
   		
   
   	void display()
   	{
   
   	}
   protected:
   	float salary=8000;
   };
   //定义一个销售经理类继承自销售员类和经理类工资为固定工资5000加销售额的提成5%。
   class SalesManager : public Manager, public Sales
   {
   public:
   	//SalesManager()
   	//{
   	//	salary = 5000;
   	//}
   	SalesManager(string  id, string  name, float sale)
   	{
   		this->id = id;
   		this->name = name;
   		this->salary = salary + sale*0.5;
   	}
   	void display()
   	{
   		cout << "ID:" << id << endl;
   		cout << "Name:" << name << endl;
   		cout << "Salary:" << salary << endl;
   	}
   
   };

   错误代码：

请问应该怎么改才对呀？？

Answer 1

class  Employee
{
public:
        Employee(){}
        Employee(string  id,string  name):id(id),name(name)
        {}
        void  display()
        {
                cout<<"ID:"<<id<<endl;
                cout<<"Name:"<<name<<endl;
        }
protected:
        string  id,name;
};

默认构造函数