c++命名空间
DetectorMessenger .hh里面报错‘B1’ has not been declared class B1::DetectorConstruction;我尝试在DetectorMessenger 的.hh文件里面也使用命名空间,报了另一个错
//
//
#ifndef B1_DETECTORMESSENGER_HH
#define B1_DETECTORMESSENGER_HH
#include "G4UImessenger.hh"
#include "globals.hh"
#include "G4UImessenger.hh"
#include "globals.hh"
class B1::DetectorConstruction;
class G4UIdirectory;
class G4UIcmdWithAString;
class G4UIcmdWithAnInteger;
class G4UIcmdWithADoubleAndUnit;
class G4UIcmdWithoutParameter;
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
class DetectorMessenger : public G4UImessenger {
public:
DetectorMessenger(B1::DetectorConstruction *);
~DetectorMessenger();
virtual void SetNewValue(G4UIcommand *, G4String);
private:
G4UIcmdWithADoubleAndUnit *fDetThickCmd;
B1::DetectorConstruction *fDetectorConstruction;
G4UIdirectory *fTestemDir;
G4UIdirectory *fDetDir;
};
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
#endif //B1_DETECTORMESSENGER_HH
另一个类 DetectorConstruction里面使用了命名空间
//
/// \file DetectorConstruction.hh
/// \brief Definition of the B1::DetectorConstruction class
#ifndef B1DetectorConstruction_h
#define B1DetectorConstruction_h 1
#include "G4VUserDetectorConstruction.hh"
#include "globals.hh"
class G4VPhysicalVolume;
class G4LogicalVolume;
classG4Material;
class G4MaterialCutsCouple;
class G4UniformMagField;
class DetectorMessenger;
/// Detector construction class to define materials and geometry.
namespace B1
{
class RunAction;
class DetectorConstruction : public G4VUserDetectorConstruction
{
public:
// DetectorConstruction(RunAction* runAction);
DetectorConstruction();
~DetectorConstruction() override;
G4VPhysicalVolume* Construct() override;
// for change Det Params
void SetDetThickness(G4double);
G4double GetDetThickness() const {return fDetThickness;};
protected:
G4LogicalVolume* fScoringVolume = nullptr;
G4LogicalVolume *fLogicTubeTarget= nullptr;
G4LogicalVolume *fLogicCryst= nullptr;
private:
RunAction* fRunAction = nullptr;
G4doublefDetThickness;
void ChangeGeometry();
DetectorMessenger* fDetectorMessenger;
};
}
#endif
复制代码
然后在DetectorConstruction.cc的构造函数里初始化的时候,fDetectorMessenger = new DetectorMessenger(this);报错了
#include "G4LogicalVolumeStore.hh"
#include "DetectorMessenger.hh"
#include "DetectorConstruction.hh"
#include "DetectorMessenger.hh"
namespace B1
{
DetectorConstruction::DetectorConstruction()
:G4VUserDetectorConstruction(),
fLogicTubeTarget(nullptr),
fLogicCryst(nullptr),
fDetectorMessenger(nullptr)
{
// create commands for interactive definition
fDetectorMessenger = new DetectorMessenger(this);
}
}
复制代码 从你的代码和描述来看,你在DetectorMessenger类中使用了B1::DetectorConstruction,而在B1::DetectorConstruction类中又使用了DetectorMessenger。这种相互依赖的情况可能会导致编译器在解析时出现问题。
首先,你需要确保B1::DetectorConstruction在DetectorMessenger之前被声明和定义。你可以在DetectorMessenger.hh文件的开头添加#include \"DetectorConstruction.hh\",这样可以确保B1::DetectorConstruction在DetectorMessenger之前被定义。
然后,你需要在DetectorMessenger类中使用前向声明来声明B1::DetectorConstruction。你可以在DetectorMessenger.hh文件中添加以下代码:
namespace B1 {
class DetectorConstruction;
}
这样,你就可以在DetectorMessenger类中使用B1::DetectorConstruction了。
最后,你需要在DetectorMessenger的构造函数中使用B1::DetectorConstruction的完全限定名。你可以将DetectorMessenger(B1::DetectorConstruction *);改为DetectorMessenger(::B1::DetectorConstruction *);。
这样,你的代码应该就可以正常编译和运行了。如果你还有其他问题,欢迎随时向我提问。
请注意,本回答来自GPT-4
如果问题已经解决,请设置最佳答案 问题的原因是在DetectorMessenger.hh文件中使用了命名空间B1,但是在class B1::DetectorConstruction;的声明中没有正确地使用命名空间。
解决方法是将class B1::DetectorConstruction;修改为class DetectorConstruction;,并且在DetectorMessenger.cc文件中也需要修改相应的代码。
修改后的代码如下:
DetectorMessenger.hh文件:
#ifndef B1_DETECTORMESSENGER_HH
#define B1_DETECTORMESSENGER_HH
#include "G4UImessenger.hh"
#include "globals.hh"
class DetectorConstruction; // 修改此处
class G4UIdirectory;
class G4UIcmdWithAString;
class G4UIcmdWithAnInteger;
class G4UIcmdWithADoubleAndUnit;
class G4UIcmdWithoutParameter;
class DetectorMessenger : public G4UImessenger {
public:
DetectorMessenger(DetectorConstruction *); // 修改此处
~DetectorMessenger();
virtual void SetNewValue(G4UIcommand *, G4String);
private:
G4UIcmdWithADoubleAndUnit *fDetThickCmd;
DetectorConstruction *fDetectorConstruction; // 修改此处
G4UIdirectory *fTestemDir;
G4UIdirectory *fDetDir;
};
#endif //B1_DETECTORMESSENGER_HH
复制代码
DetectorMessenger.cc文件:
#include "G4LogicalVolumeStore.hh"
#include "DetectorMessenger.hh"
#include "DetectorConstruction.hh"
#include "DetectorMessenger.hh"
DetectorConstruction::DetectorConstruction()
:G4VUserDetectorConstruction(),
fLogicTubeTarget(nullptr),
fLogicCryst(nullptr),
fDetectorMessenger(nullptr)
{
// create commands for interactive definition
fDetectorMessenger = new DetectorMessenger(this);
}
复制代码
这样修改后,命名空间的使用将正确地被声明和使用,问题应该就可以解决了。
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