c++函数对象

[weiqibaxia]

今天看了c++函数对象，感觉不是很明白。烦请大虾给个具体的示例讲解一下~~~~

[Binzo]

//employ.h
class employee{
public:
employee();
virtual~employee();
virtual void pay()=0;
virtual void promote(int);
void SetName(char*);
char *GetName();
int GetindividualEmpNo() const;
int Getgrade() const;
float GetaccumPay() const;
protected:
char name[20];
int individualEmpNo;
int grade;
float accumPay;
static int employeeNo;
};

class technician:public employee{
public:
technician();
void SetworkHours(int wh);
void pay();
void promote(int);
private:
float hourlyRate;
int workHours;
};

class salesman:virtual public employee{
public:
salesman();
void Setsales(float sl);
void pay();
void promote(int);
protected:
double CommRate;
float sales;
};

class manager:virtual public employee{
public:
manager();
void pay();
void promote(int);
protected:
float monthlyPay;
};

class salesmanager:public manager,public salesman{
public:
salesmanager();
void pay();
void promote(int);
};

[無_1024]

把书上的例子敲一遍就差不多了

[Binzo]

//employ.h
class employee{
public:
employee();
virtual~employee();
virtual void pay()=0;
virtual void promote(int);
void SetName(char*);
char *GetName();
int GetindividualEmpNo() const;
int Getgrade() const;
float GetaccumPay() const;
protected:
char name[20];
int individualEmpNo;
int grade;
float accumPay;
static int employeeNo;
};

class technician:public employee{
public:
technician();
void SetworkHours(int wh);
void pay();
void promote(int);
private:
float hourlyRate;
int workHours;
};

class salesman:virtual public employee{
public:
salesman();
void Setsales(float sl);
void pay();
void promote(int);
protected:
double CommRate;
float sales;
};

class manager:virtual public employee{
public:
manager();
void pay();
void promote(int);
protected:
float monthlyPay;
};

class salesmanager:public manager,public salesman{
public:
salesmanager();
void pay();
void promote(int);
};

[Binzo]

employee为类，其内封装其成员。
employee whoesname（）；就声明了对象whosname。

[muyu1990]

[就想叫yoko]

我也不懂

[Binzo]

受教！

[PG]

google :
input : C++ 函数对象
output: 多得你想吐

[立行]

Binzo说的那里面有函数对象吗？我怎么没看到
函数对象是指类重写了operator()操作符的对象，比如

#include <iostream>
using namespace std;
class Fun {
public:
void operator() (void){
cout << "this is a funtion object." << endl;
}
}

这就是一个函数对象类

int main()
{
Fun fun;
fun();
}

将输出
this is a function object.

[立行]

#include <iostream>
using namespace std;
class Fun {
public:
  void operator() (void){
  cout << "this is a funtion object." << endl;
  }
}
int main()
{
  Fun fun;
  fun();
}

重新发一下

[sszlf]

看看书就明白了，以前我也晕过

[xpston008]

函数对象 就跟函数形式一样。带个()吧 。需要重载operator()

[linsen_519]

一个类只要它重载了operator()，那么它所创建的对象就是函数对象

[qq120848369]

函数对象是一个对象,不是类.

对象所属的类重载了()操作符,于是可以用:对象()这样的形式来做一些事.