我正试图让我的班级做以下事情......
EmployeeHandler：将m_employeeCount初始化为零。
AddEmployee：由菜单选项1调用。显示“NEW EMPLOYEE”。提示用户
员工的名字，姓氏和工资率，一次一个。使用Employee.Setup添加
雇员到m_lstEmployee。显示“已添加员工m_employeeCount”。增量
m_employeeCount。
EmployeeSelection：按索引显示员工列表;提示用户提供员工
索引并返回索引。
EditEmployee：由菜单选项2调用。使用EmployeeSelection获取索引
员工要编辑。验证索引是否有效，如果不是，则显示错误消息。用途
Employee.Output显示所选员工的当前信息。提示用户
员工的新名字，姓氏和工资率，一次一个。使用Employee.Setup来
在m_lstEmployee中更改员工的信息。显示“**员工索引已更新”，
其中index是用户选择的索引。
LayoffEmployee：由菜单选项3调用。使用EmployeeSelection获取索引
员工要裁员。使用Employee.Output显示所选员工的名字，最后一个
名称和工资率。使用Employee.LayOff关闭员工。显示“员工
指数下岗“，其中指数被裁掉员工指数。
DisplayEmployeeList：由菜单选项4调用。显示“EMPLOYEES”。然后使用
Employee.Output显示每个员工记录这样的事情，“[1] David Johnson，
支付：5.00美元（现在的员工）“和这样的前员工记录，”[2]
PAY：$ 5.00（前雇员）“，括号中的数字是
员工在m_lstEmployee中的索引。
GetEmployee：返回m_lstEmployee中所选员工记录的地址。
GetEmployeeCount：返回m_employeeCount中的员工数。
到目前为止，我有......
#ifndef _EMPLOYEEHANDLER
#define _EMPLOYEEHANDLER
#include "Employee.h"
class EmployeeHandler
{
public:
EmployeeHandler()
{
m_employeeCount = 0; //undefined?
};
void AddEmployee()
{
string firstName;
string lastName;
float payRate;
cout<<"NEW EMPLOYEE"<<endl;
cout<<"First Name:"<<endl;
cin>>firstName;
cout<<"Last Name:"<<endl;
cin>>lastName;
cout<<"Pay Rate:"<<endl;
cin>>payRate;
Employee.Setup(firstName,lastName,payRate); //Problem here
cout<<"**Employee m_employeeCount added"<<endl;
m_employeeCount+=1; //m_employeeCount undefined?
}
void EditEmployee()
{
int indexEdit;
string newFirst;
string newLast;
float newPay;
cout<<"Which employee would you like to edit"<<endl;
cin>>indexEdit;
EmployeeSelection(indexEdit); //undefined?
Employee.Output(); //
cout<<"Employee new first name:"<<endl;
cin>>newFirst;
cout<<"Employee new last name:"<<endl;
cin>>newLast;
cout<<"Employee new pay rate:"<<endl;
cin>>newPay;
Employee.Setup(newFirst,newLast,newPay); ///
cout<<"** Employee index updated"<<endl;
}
void LayoffEmployee()
{
EmployeeSelection();
Employee.Output(EmployeeSelection); //Problems here
Employee.LayOff(EmployeeSelection);
cout<<"Employee laid off"<<endl;
}
void DisplayEmployeeList()
{
cout<<"EMPLOYEES"<<endl;
for (int i=0; i<50; i++)
cout<<[i]<<Employee.Output(m_1stEmployee)<<endl; //
}
int EmployeeSelection()
{
int indexNumber;
for (int i= 0; i <50; i++)
cout<<[i]m_1stEmployee<<endl; //
cout<<"Which Employee Index would you like to select?"<<endl;
cin>>indexNumber;
for (int i = 0; i <50; i++)
if ([i]=indexNumber) //
return [i]
}
Employee& GetEmployee( int index )
{if (index=; // completely confused here
}
int GetEmployeeCount()
{
return m_employeeCount;
};
private:
Employee m_lstEmployee[50];
int m_employeeCount;
};
#endif
employee.h文件如下......
#ifndef _EMPLOYEE
#define _EMPLOYEE
#include<iostream>
#include<iomanip>
#include <string>
using namespace std;
class Employee
{
public:
void Setup( const string& first, const string& last, float pay );
{
m_firstName = first;
m_lastName = last;
m_payPerHour = pay;
m_activeEmployee = true;
}
string GetName()
{
return m_firstName+""+m_lastName
};
bool GetIsActive()
{
return m_activeEmployee;
};
void LayOff()
{
m_activeEmployee= false;
};
void Output()
cout<<GetName()<<",PAY:$"<<fixed<<setprecision(2)<<m_payPerHour<<endl;
private:
string m_firstName;
string m_lastName;
float m_payPerHour;
bool m_activeEmployee;
};
#endif
过去两天我一直在努力想弄清楚我做错了什么。这是我第一次尝试用C ++编写类。任何和所有的帮助都非常感谢。我标记了//我遇到问题的地方。
答案 0 :(得分：2)
你的代码有很多很多问题......
首先，我将提供可编辑的代码，或多或少地执行您想要的代码。我不确定如何提问，但将它与你自己的代码进行比较并阅读一本好的c ++书......
我用矢量替换了你的数组。我使用了构造函数来初始化Employee。我（对我自己的沮丧）添加了std，主要是因为Employee应该存在于自己的头文件中，并且在头文件中使用命名空间并不好。
在c ++中，operator []是后缀（在索引表达式之后）。
另外，在正常情况下，我会尝试在可能的情况下保持接口和实现分离。至少我不会使用内联函数，如果不是绝对必要的话。
新代码......：
#include <iostream>
#include <iomanip>
#include <vector>
#include <iterator>
#include <string>
class Employee
{
public:
//This is a constructor....
Employee( const std::string& first, const std::string& last, float pay )
//The members can be initialized in a constructor initializer list as below.
: m_firstName( first ), m_lastName( last ), m_payPerHour( pay ),
m_activeEmployee() //Scalars are initialized to zero - bool to false...
{
}
std::string GetName() const
{
return m_firstName+" "+m_lastName;
}
bool GetIsActive() const
{
return m_activeEmployee;
};
void LayOff()
{
m_activeEmployee = false;
}
std::ostream& Output( std::ostream& out ) const
{
return out << GetName() <<",PAY:$"
<< std::fixed << std::setprecision(2) << m_payPerHour;
}
private:
std::string m_firstName;
std::string m_lastName;
float m_payPerHour;
bool m_activeEmployee;
};
inline std::ostream& operator << ( std::ostream& os, const Employee& employee )
{
return( employee.Output( os ) );
}
class EmployeeHandler
{
public:
void AddEmployee()
{
std::string firstName;
std::string lastName;
float payRate;
std::cout<<"NEW EMPLOYEE"<<std::endl;
std::cout<<"First Name:"<<std::endl;
std::cin>>firstName;
std::cout<<"Last Name:"<<std::endl;
std::cin>>lastName;
std::cout<<"Pay Rate:"<<std::endl;
std::cin>>payRate;
employees_.push_back( Employee( firstName,lastName,payRate ) );
std::cout<<"**Employee m_employeeCount added"<<std::endl;
}
void EditEmployee()
{
std::string newFirst;
std::string newLast;
float newPay;
std::cout<<"Which employee would you like to edit"<<std::endl;
int indexEdit = GetSelection();
Employee& employee = employees_[indexEdit];
std::cout << employee << std::endl;
std::cout<<"Employee new first name:"<<std::endl;
std::cin>>newFirst;
std::cout<<"Employee new last name:"<<std::endl;
std::cin>>newLast;
std::cout<<"Employee new pay rate:"<<std::endl;
std::cin>>newPay;
employee = Employee( newFirst, newLast, newPay );
std::cout<<"** Employee index updated"<<std::endl;
}
void LayoffEmployee()
{
int index = GetSelection();
if( employees_[index].GetIsActive() )
{
std::cout << "Laying off employee:\n" << employees_[index] << std::endl;
employees_[index].LayOff();
}
else
{
std::cerr << "Already layed off employee:" << employees_[index] << std::endl;
}
}
void DisplayEmployeeList()
{
std::copy( employees_.begin(), employees_.end(), std::ostream_iterator<Employee>( std::cout, "\n" ) );
}
int GetSelection()
{
std::size_t indexNumber;
std::cout << "Select an employee from the list below by specifying its number:" << std::endl;
DisplayEmployeeList();
do{
while( !std::cin >> indexNumber )
{
std::cin.clear();
std::cin.ignore();
std::cerr << "Select a number..." << std::endl;
}
if( indexNumber >= employees_.size() )
{
std::cerr << "Select a number within range of list below:" << std::endl;
DisplayEmployeeList();
}
}
while( indexNumber >= employees_.size() );
return indexNumber;
}
Employee& operator[]( std::size_t index )
{
return employees_[index];
}
const Employee& operator[]( std::size_t index ) const
{
return employees_[index];
}
std::size_t EmployeeCount() const
{
return employees_.size();
}
private:
std::vector<Employee> employees_;
};
int main( int argc, char* argv[] )
{
return 0;
}
最后 - 代码只是编译而不是测试。我怀疑我可能犯了一个错误，但唉，时间!!!