Question

我正在编辑它，现在好了，我应用了一个空的构造函数，并且我的代码工作了，但是这种方式：

名称1 S名称1 1000 0.2 100 Name2 SName2 1000 0.3 750

此代码通常可以正常运行，我的老师特别希望我们使用“ this->”和“ * this”，所以这是我的代码：我的.h文件

#ifndef COMEMPLOYEE_H
#define COMEMPLOYEE_H
#include <string>
using namespace std;
class ComEmployee
{
protected:
string firstName;
string lastName;
static int ID;
double grossSale;
double comRate;

public:
ComEmployee();
ComEmployee(string, string, double, double);
ComEmployee& setfirstName(string);
ComEmployee& setlastName(string);
ComEmployee& setgrossSale(double);
ComEmployee& setcomRate(double);
string getfirstName();
string getlastName();
double getgrossSale();
double getcomRate();
int getID() const;
double calCom() const;
void Display() const;

};


#endif

我的.cpp文件

#include "ComEmployee.h"
#include <iostream>

using namespace std;

int ComEmployee::ID = 1000;
ComEmployee::ComEmployee(){}

ComEmployee::ComEmployee(string name, string lname, double gs, double comr)
{
this->firstName = name;
this->lastName = lname;
this->grossSale = gs;
this->comRate = comr;
++ID;
}

int ComEmployee::getID() const
{
return ID;
}

ComEmployee & ComEmployee::setfirstName(string name)
{
firstName = name;
return *this;
}

ComEmployee & ComEmployee::setlastName(string lname)
{
lastName = lname;
return *this;
}

ComEmployee & ComEmployee::setgrossSale(double gs)
{
grossSale = gs;
return *this;
}

ComEmployee & ComEmployee::setcomRate(double comr)
{
comRate = comr;
return *this;
}

string ComEmployee::getfirstName()
{
return firstName;
}

string ComEmployee::getlastName()
{
return lastName;
}

double ComEmployee::getgrossSale()
{
return grossSale;
}

double ComEmployee::getcomRate()
{
return comRate;
}


double ComEmployee::calCom() const
{
return grossSale*comRate;
}

void ComEmployee::Display() const
{
cout << firstName << " "  << " " << getID() << " " << comRate << " " << calCom() << endl;
}

这是我的main.cpp文件

#include <iostream>
#include "ComEmployee.h"

using namespace std;

int main()
{
ComEmployee employee, employee2;
employee.setfirstName("Name1").setlastName("SName1").setgrossSale(500).setcomRate(0.2).Display();
employee2.setfirstName("Name2").setlastName("SName2").setgrossSale(2500).setcomRate(0.3).Display();

system("pause");

}

我希望输出为：

Name1 SName1 1001 ... Name2 SName2 1002 ...

Answer 1

在类定义中添加一些int变量：

int m_ID;

然后，您需要在cpp文件中使用默认构造函数：

// cpp
ComEmployee::ComEmployee()
{
    m_ID = ID++;
}

并修改您的GetID函数：

int ComEmployee::GetID() const
{
    return m_ID;
}

Answer 2

您必须稍微更改设计。由于ID是员工ID，因此它不能是static变量。 static变量属于类，而不是的特定实例班级。
将ID定义为该类的普通成员。

您可以使用新的static变量CurrentID来跟踪员工。
如下定义后，

int ComEmployee::CurrentID = 1000;

在默认和非默认构造函数中，执行以下操作：

this->ID = CurrentID++;

类员工ID计数C ++

2 个答案: