我在大学的第二个C ++课程的中间（到最后）。我的问题有点容易。基本上，我在一个标题中定义了一个名为HKLM\System\CurrentControlSet\Services\NPF\TimestampMode的类，我有一个名为class Stock_Type的类模板，它有一个名为template<class T> class Stock_List_Type的模板的派生类。在这个派生类中没有定义任何内容，因为当我尝试编译class Stock_Data : public Stock_List_Type<Stock_Type>只是为了看到标题可以编译时，我得到以下内容：
main()以下是我的代码的全部内容
In file included from stock.h:4:0,
from sandbox.cpp:1:
stock_list_type.h:53:42: error: ‘Stock_Type’ was not declared in this scope
class Stock_Data: public Stock_List_Type<Stock_Type>
^~~~~~~~~~
stock_list_type.h:53:42: note: suggested alternative: ‘Stock_Data’
class Stock_Data: public Stock_List_Type<Stock_Type>
^~~~~~~~~~
Stock_Data
stock_list_type.h:53:52: error: template argument 1 is invalid
class Stock_Data: public Stock_List_Type<Stock_Type>
^
#ifndef STOCK_H
#define STOCK_H
#include"stock_list_type.h"
#include<iostream>
class Stock_Type
{
std::string stock_symbol;//record data1
double opening_price, closing_price, high_price, low_price, prev_close;//record data2
int volume;//record data3
double percent_gain;
public:
//constructor overloads-----------------------------------------------------------------------------------------------------
Stock_Type();
Stock_Type(std::string sym, double a, double b, double c, double d, double e, int f, double g) :
stock_symbol(sym), opening_price(a), closing_price(b), high_price(c), low_price(d), prev_close(e), volume(f), percent_gain(g) {}
//default destructor--------------------------------------------------------------------------------------------------------
~Stock_Type();
//accessor functions--------------------------------------------------------------------------------------------------------
void set_Symbol(std::string x){stock_symbol = x;}
void set_Closing_Price(double x){closing_price = x;}
void set_High_Price(double x){high_price = x;}
void set_Low_Price(double x){low_price = x;}
void set_Prev_Close(double x){prev_close = x;}
void set_Volume(int x){volume = x;}
std::string get_Stock_Smybol(){return stock_symbol;}
double get_Opening_Price(){return opening_price;}
double get_Closing_Price(){return closing_price;}
double get_High_Price(){return high_price;}
double get_Low_Price(){return low_price;}
double get_Prev_Close(){return prev_close;}
int get_Volume(){return volume;}
double get_Percent_Gain_Loss(){return get_Closing_Price() - get_Opening_Price();}
//operations on Stock_Type-------------------------------------------------------------------------------------------------------
//operator functions--------------------------------------------------------------------------------------------------------------
};
#endif
我想要做的是使用#ifndef STOCK_LIST_TYPE_H
#define STOCK_LIST_TYPE_H
#include"stock.h"
template<class T>
class Stock_List_Type
{
//copy constructor
Stock_List_Type(const Stock_List_Type& object_reference)
{
p_Size = object_reference.get_p_Size();
p_Type = new T[p_Size];
for(int i = 0; i < p_Size; i++)
{
p_Type[i] = object_reference[i];
}
}
//destructor
~Stock_List_Type(){delete [] p_Type;}
//accessors
void set_p_Size(const int x){p_Size = x;}
int get_p_Size() const {return p_Size;}
//operator overloads
Stock_List_Type& operator=(const Stock_List_Type& right_operand)
{
if(this == &right_operand){return *this;}
delete [] p_Type;
p_Size = right_operand.get_p_Size();
p_Type = new T[p_Size];
return *this;
}
Stock_List_Type& operator[](int elem){return p_Type[elem];}
//variables declared as public, as it is a more natural representation
//how arrays work
T *p_Type;
int p_Size;
};
class Stock_Data: public Stock_List_Type<Stock_Type>
{
//in this derived class, operations for management of stock file data shall be defined
//data extractors
};
#endif
创建class Stock_List_Type个对象列表，并使用class Stock_Type与class Stock_Data一起操作数据进/出一个文本文件，其中包含要存储在class Stock_List_Type中的相关股票信息，然后很好地显示它......以及其他内容。赋值要求“通用”列表有一个类模板，并派生一个专门的类来处理class Stock_Type的列表方法。
非常感谢，我为这篇长篇帖子道歉！感谢编码员！
PS：我使用的是Ubuntu 17.1并使用g ++