请假设我的代码示例已经存在标题。
我似乎无法使其发挥作用。
错误说：
c:\program files (x86)\microsoft visual studio 10.0\vc\include\fstream(890): error C2248: 'std::basic_ios<_Elem,_Traits>::basic_ios' : cannot access private member declared in class 'std::basic_ios<_Elem,_Traits>'
这是我的作业问题：
问题：按键值对员工进行排序。
对于此作业，您将扩展您之前编写的员工薪资报表程序。应修改您的程序以允许输入最多15名员工的数据。无论输入员工数据的顺序如何，报表的详细信息行都应按升序员工姓名顺序打印。换句话说，您应该首先在生成报告之前对员工数据进行排序。您的程序应包括为之前的任务描述的Employee和Payroll Report类。
class Employee
{
public:
Employee();
int input();
void calculate();
void display();
void input_storage(Employee []);
void sort(Employee[], int);
void swap(Employee &, Employee &);
void set_name(string);
string get_name();
void set_hours(double);
double get_hours();
void set_rate(double);
double get_rate();
void set_ovrhours(double);
double get_ovrhours();
void set_sal(double);
double get_sal();
void set_ovrsal(double);
double get_ovrsal();
void set_count(int);
int get_count();
private:
string name;
int count;
double hours, rate, ovrhours, sal, ovrsal;
ifstream infile;
};
Employee::Employee()
{
count=0;
infile.open("payroll.txt", ios::in);
if (!infile)
cout << " Error: Could not open input file. \n";
}
void Employee::set_name(string new_name)
{
name=new_name;
}
void Employee::set_hours(double new_hours)
{
hours=new_hours;
}
void Employee::set_rate(double new_rate)
{
rate=new_rate;
}
void Employee::set_sal(double new_sal)
{
sal=new_sal;
}
void Employee::set_ovrsal(double new_ovrsal)
{
ovrsal=new_ovrsal;
}
void Employee::set_ovrhours(double new_ovrhours)
{
ovrhours=new_ovrhours;
}
int Employee::input()
{
if (infile >> name >> hours >> rate)
return 1;
else
return 0;
}
void Employee::calculate()
{
ovrhours=hours-40;
if (ovrhours>=10)
{
ovrsal=(10*(1.5*rate))+((hours-50)*(2*rate));
sal=(40*rate)+ovrsal;
}
else if (ovrhours>0 && ovrhours<10)
{
ovrsal=ovrhours*(rate*1.5);
sal=(40*rate)+ovrsal;
}
else
{
ovrhours=0.0;
ovrsal=0.0;
sal=hours*rate;
}
}
void Employee::input_storage(Employee storage[])
{
storage[count].name=name;
storage[count].rate=rate;
storage[count].hours=hours;
storage[count].ovrhours=ovrhours;
storage[count].ovrsal=ovrsal;
storage[count].sal=sal;
count++;
}
void Employee::sort(Employee storage[], int n)
{
n=count;
for (int i=n-1; i>0; i--)
for (int j=0; j<i; j++)
if (storage[j].name > storage[j+1].name) swap(storage[j],storage[j+1]);
}
void Employee::swap(Employee &a, Employee &b)
{
Employee temp = a;
a = b;
b = temp;
}
void Employee::display()
{
cout << "Report is created in your respective workspace." << endl;
}
string Employee::get_name()
{
return name;
}
double Employee::get_rate()
{
return rate;
}
double Employee::get_ovrhours()
{
return ovrhours;
}
double Employee::get_hours()
{
return hours;
}
double Employee::get_sal()
{
return sal;
}
double Employee::get_ovrsal()
{
return ovrsal;
}
class PayrollReport
{
public:
PayrollReport();
void insertDetail(Employee [], int);
void border(int);
void display_total(Employee[]);
void columnheadings();
void indent(int);
void reportheader();
void skiplines(int);
private:
double tot_hours, tot_ovrhours, tot_ovrsal, tot_sal;
ofstream outreport;
};
PayrollReport::PayrollReport()
{
outreport.open("report.txt", ios::out);
tot_hours=0.0;
tot_ovrhours=0.0;
tot_ovrsal=0.0;
tot_sal=0.0;
}
void PayrollReport::indent(int n)
{
for (int i=0; i<n; i++)
outreport << " ";
}
void PayrollReport::skiplines (int n)
{
for (int i=1; i<=n; i++)
outreport << endl;
}
void PayrollReport::reportheader()
{
border(100);
skiplines(1);
indent(37);
outreport << "EMPLOYEE PAYROLL REPORT"<<endl;
border(100);
}
void PayrollReport::columnheadings()
{
outreport << endl<<setiosflags(ios::right)
<< setw (15) << ' ' << setw (10) << "Hourly"
<< setw(10) <<" " << setw(10) << "Overtime"
<< setw(10) << "Overtime" << setw(10) <<"Total" << endl
<< setiosflags(ios::left) << setw (15) << "Name"
<< setiosflags(ios::right)
<< setw (10) << "Rate" << setw(10) << "Hours" << setw(10) << "Hours"
<< setw(10) << "Salary" << setw(10) <<"Salary" << endl;
border(100);
skiplines(1);
}
void PayrollReport::insertDetail(Employee storage[], int n)
{
outreport << setiosflags(ios::right)<<setprecision(2) << std::fixed <<setw(15)<< storage[n].get_name() << ' ' <<
setw(10)<<storage[n].get_hours()<< setw(10) << storage[n].get_rate() << setw(10)<< storage[n].get_ovrhours() << setw(10)
<< storage[n].get_ovrsal() << setw(10) << storage[n].get_sal() << endl;
tot_hours+=storage[n].get_hours();
tot_sal+=storage[n].get_sal();
tot_ovrhours+=storage[n].get_ovrhours();
tot_ovrsal+=storage[n].get_ovrsal();
}
void PayrollReport::display_total(Employee[])
{
border(100);
skiplines(1);
outreport << setiosflags(ios::showpoint | ios::fixed | ios::right)
<< setw(15)<<"Totals"<<setw(22) << tot_hours
<< setw(10) << tot_ovrhours
<< setw(10) << tot_ovrsal
<< setw(10) << tot_sal << endl;
skiplines(4);
border(100);
skiplines(1);
border(100);
}
void PayrollReport::border(int n)
{
for (int i=0; i<n; i++)
outreport << "-";
}
int main()
{
int loopcount;
Employee x;
Employee storage[15];
PayrollReport p;
p.reportheader();
p.columnheadings();
while (x.input()==1)
{
x.calculate();
x.input_storage(storage);
loopcount++;
}
x.sort(storage, loopcount);
for (int i=0; i<loopcount; i++)
p.insertDetail(storage, loopcount);
p.display_total(storage);
x.display();
cin.ignore();
return 0;
}
答案 0 :(得分：2)
有很多代码与实际问题无关！
以下是如何将其缩减为SSCCE以便我们更轻松地为您提供帮助：
#include <iostream>
#include <fstream>
using namespace std;
class Employee
{
public:
Employee();
void swap(Employee &, Employee &);
private:
int count;
ifstream infile;
};
Employee::Employee()
{
count=0;
infile.open("payroll.txt", ios::in);
if (!infile)
cout << " Error: Could not open input file. \n";
}
void Employee::swap(Employee &a, Employee &b)
{
Employee temp = a;
a = b;
b = temp;
}
这更清楚地表明问题是Employee的复制构造函数被隐式删除，因为infile有一个已删除的复制构造函数。此副本在Employee::swap()中调用。
请参阅using fstream object created as class member以获取解释。
似乎解决此问题的最佳方法是从infile删除Employee的所有知识（文件处理应该由Employee类负责吗？）。
我会删除int Employee::input()并将其替换为operator >>的{{1}}重载来完成此操作，例如：
Employee然后，您需要更改std::ifstream& operator >>(std::ifstream& is, Employee& employee)
{
std::string name;
double hours, rate;
if (is >> name >> hours >> rate)
{
employee.set_name(name);
employee.set_hours(hours);
employee.set_rate(rate);
}
return is;
}
功能中文件的打开和阅读方式：
main()