我一直在设置一个设置类,如果此文件不存在,可以从文件加载设置或加载默认设置。 我的想法是有一个CSettings类来处理所有设置和文件查询。还有一个CDefaultSettings类,它存储所有默认设置。 这两个类都必须能够访问枚举集。
我得到的错误是:
Settings.cpp: In member function 'std::string CSettings::GetSetting(const CSettings::TProgramSetting&)':
Settings.cpp:6:28: error: invalid use of incomplete type 'class CDefaultSettings'
return iDefaultSettings->GetDefaultSetting(aProgramSetting);
^
谁能告诉我我做错了什么
我的档案:
的main.cpp
#include <iostream>
#include <string>
#include "Settings.h"
int main()
{
CSettings programSettings;
std::string setting = programSettings.GetSetting(CSettings::TProgramSetting::Setting1);
std::cout << setting << std::endl;
return 0;
}
Settings.h
#include <map>
#include <string>
class CDefaultSettings;
class CSettings
{
public:
typedef enum {
Setting1,
Setting2,
Setting3
} TProgramSetting;
private:
CDefaultSettings *iDefaultSettings;
public:
std::string GetSetting(const CSettings::TProgramSetting& aProgramSetting);
};
Settings.cpp
#include "Settings.h"
std::string CSettings::GetSetting(const CSettings::TProgramSetting& aProgramSetting)
{
// As a test, return a default setting
return iDefaultSettings->GetDefaultSetting(aProgramSetting);
}
DefaultSettings.h
#include <map>
#include "Settings.h"
class CDefaultSettings
{
public:
typedef std::map<CSettings::TProgramSetting, std::string> TDefaultProgramSettingCollection;
TDefaultProgramSettingCollection iDefaultProgramSettingCollection;
public:
void LoadDefaultSettings();
std::string GetDefaultSetting(const CSettings::TProgramSetting& aProgramSetting);
};
DefaultSettings.cpp
#include "DefaultSettings.h"
void CDefaultSettings::LoadDefaultSettings()
{
iDefaultProgramSettingCollection[CSettings::TProgramSetting::Setting1] = "Default setting 1";
iDefaultProgramSettingCollection[CSettings::TProgramSetting::Setting2] = "Default setting 1";
iDefaultProgramSettingCollection[CSettings::TProgramSetting::Setting3] = "Default setting 1";
}
std::string CDefaultSettings::GetDefaultSetting(const CSettings::TProgramSetting& aProgramSetting)
{
return iDefaultProgramSettingCollection[aProgramSetting];
}
答案 0 :(得分:3)
您的Settings.cpp
文件似乎缺少#include "DefaultSettings.h"
另外一定要添加包含警卫la
#ifndef SETTINGS_H
#define SETTINGS_H
...
#endif`
进入settings.h
(通常在每个标题中),否则它将包含在#include "Settings.h"
中的settings.cpp
和DefaultSettings.h
中包含的重复定义中。