C++ 多定义错误:如何在头文件中声明引用?
rWidgetPlots.hC++ 多定义错误:如何在头文件中声明引用?,c++,qt,reference,header,C++,Qt,Reference,Header,rWidgetPlots.h qtGUI.o:(.bss+0x0): multiple definition of `R' rWidgetPlots.o:(.bss+0x0): first defined here qtGUI.o:(.rodata+0x0): multiple definition of `qtToR' rWidgetPlots.o:(.rodata+0x0): first defined here main.o:(.bss+0x0): multiple definition
qtGUI.o:(.bss+0x0): multiple definition of `R'
rWidgetPlots.o:(.bss+0x0): first defined here
qtGUI.o:(.rodata+0x0): multiple definition of `qtToR'
rWidgetPlots.o:(.rodata+0x0): first defined here
main.o:(.bss+0x0): multiple definition of `R'
rWidgetPlots.o:(.bss+0x0): first defined here
main.o:(.rodata+0x0): multiple definition of `qtToR'
rWidgetPlots.o:(.rodata+0x0): first defined here
moc_qtGUI.o:(.bss+0x0): multiple definition of `R'
rWidgetPlots.o:(.bss+0x0): first defined here
moc_qtGUI.o:(.rodata+0x40): multiple definition of `qtToR'
rWidgetPlots.o:(.rodata+0x0): first defined here
#ifndef RWIDGETPLOTSH
#define RWIDGETPLOTSH
#include <iostream>
#include <RInside.h>
#include <Rcpp.h>
#include <vector>
#include <limits>
#include <QRect>
#include <fstream>
#include "zoomAndCornerDatabaseParser.h"
RInside R (0, NULL);
RInside & qtToR (R);
typedef struct
{
double latitude;
double longitude;
unsigned int vehicleId;
} vehicle;
extern std :: vector <vehicle> vehicleInfo;
typedef struct
{
float latitude;
float longitude;
} coordinate;
extern std :: vector <coordinate> previousPoints;
class rdaTilesOnR
{
public:
static std :: string returnCenterPoint (std :: string fileName);
static std :: string findPanningDirection (float newLatitude, float newLongitude,
std :: string topLeftLat, std :: string topLeftLng,
std :: string northEastLat, std :: string northEastLng,
std :: string bottomRightLat, std :: string bottomRightLng,
std :: string southWestLat, std :: string southWestLng);
static void storeVehicleInfo (float latitude, float longitude, unsigned int vehicleId);
static void loadNewTileAndPlotPointsOnRWidget (unsigned short option, float newLongitude, float newLatitude);
static std :: string doesPointLieInBoundaries (unsigned short option, float newLatitude, float newLongitude, float currentCenterLatitude, float currentCenterLongitude);
};
#endif
#ifndef RWIDGETPLOTSH
#定义RWIDGETPLOTSH
#包括
#包括
#包括
#包括
#包括
#包括
#包括
#包括“zoomAndCornerDatabaseParser.h”
漂洗液R(0,空);
冲洗液和QTOR(R);
类型定义结构
{
双纬度;
双经度;
未签名的int vehicleId;
}车辆;
外部标准::矢量车辆信息;
类型定义结构
{
浮动纬度;
浮动经度;
}协调;
外部标准::向量优先点;
类rdaTilesOnR
{
公众:
静态std::string returnCenterPoint(std::string文件名);
静态标准::字符串FindPlanningDirection(浮点新纬度、浮点新经度、,
std::string topLeftLat,std::string topLeftLng,
标准::字符串东北纬度,标准::字符串东北LNG,
std::string bottomRightLat,std::string bottomRightLng,
标准:串西南纬度,标准:串西南LNG);
静态void storeVehicleInfo(浮动纬度、浮动经度、无符号整数vehicleId);
静态void loadnewileandplotpointsonrwidget(无符号短选项、浮点新经度、浮点新纬度);
静态std::string DoesPointInBoundaries(无符号短选项、浮点新纬度、浮点新经度、浮点currentCenterLatitude、浮点currentCenterLatitude);
};
#恩迪夫
qtGUI.h
qtGUI.o:(.bss+0x0): multiple definition of `R'
rWidgetPlots.o:(.bss+0x0): first defined here
qtGUI.o:(.rodata+0x0): multiple definition of `qtToR'
rWidgetPlots.o:(.rodata+0x0): first defined here
main.o:(.bss+0x0): multiple definition of `R'
rWidgetPlots.o:(.bss+0x0): first defined here
main.o:(.rodata+0x0): multiple definition of `qtToR'
rWidgetPlots.o:(.rodata+0x0): first defined here
moc_qtGUI.o:(.bss+0x0): multiple definition of `R'
rWidgetPlots.o:(.bss+0x0): first defined here
moc_qtGUI.o:(.rodata+0x40): multiple definition of `qtToR'
rWidgetPlots.o:(.rodata+0x0): first defined here
#ifndef RWIDGETPLOTSH
#define RWIDGETPLOTSH
#include <iostream>
#include <RInside.h>
#include <Rcpp.h>
#include <vector>
#include <limits>
#include <QRect>
#include <fstream>
#include "zoomAndCornerDatabaseParser.h"
RInside R (0, NULL);
RInside & qtToR (R);
typedef struct
{
double latitude;
double longitude;
unsigned int vehicleId;
} vehicle;
extern std :: vector <vehicle> vehicleInfo;
typedef struct
{
float latitude;
float longitude;
} coordinate;
extern std :: vector <coordinate> previousPoints;
class rdaTilesOnR
{
public:
static std :: string returnCenterPoint (std :: string fileName);
static std :: string findPanningDirection (float newLatitude, float newLongitude,
std :: string topLeftLat, std :: string topLeftLng,
std :: string northEastLat, std :: string northEastLng,
std :: string bottomRightLat, std :: string bottomRightLng,
std :: string southWestLat, std :: string southWestLng);
static void storeVehicleInfo (float latitude, float longitude, unsigned int vehicleId);
static void loadNewTileAndPlotPointsOnRWidget (unsigned short option, float newLongitude, float newLatitude);
static std :: string doesPointLieInBoundaries (unsigned short option, float newLatitude, float newLongitude, float currentCenterLatitude, float currentCenterLongitude);
};
#endif
#ifndef QTGUIH
#定义QTGUIH
#包括
#包括
#包括
#包括
#包括
#包括
#包括
#包括
#包括“rWidgetPlots.h”
类控件rthrawqt:publicqwidget
{
Q_对象
QTextEdit*文本编辑;
公众:
void接口();
公众时段:
void slotPanLeft();
void slotPanRight();
void slotPanTop();
void slotPanBottom();
void slotZoomIn();
void slotZoomOut();
void slotRefresh();
单击()将findinfo作废;
};
#恩迪夫
QTOR
这里是一个参考。它必须在那时和那里定义。如何解决此错误?使用extern
没有帮助
它必须在那时和那里定义
那么,这是不可能的。如果您愿意将其保留在标题中:
#ifndef QTGUIH
#define QTGUIH
#include <QApplication>
#include <QMainWindow>
#include <QtCore>
#include <QtGui>
#include <QPushButton>
#include <unistd.h>
#include <iostream>
#include <string.h>
#include "rWidgetPlots.h"
class controlRThroughQt : public QWidget
{
Q_OBJECT
QTextEdit *textEdit;
public:
void qtInterface ();
public slots:
void slotPanLeft ();
void slotPanRight ();
void slotPanTop ();
void slotPanBottom ();
void slotZoomIn ();
void slotZoomOut ();
void slotRefresh ();
void findInfoByClicking ();
};
#endif
并将定义移动到单个实现文件:
extern RInside R;
extern RInside & qtToR;
那就行了
它必须在那时和那里定义
那么,这是不可能的。如果您愿意将其保留在标题中:
#ifndef QTGUIH
#define QTGUIH
#include <QApplication>
#include <QMainWindow>
#include <QtCore>
#include <QtGui>
#include <QPushButton>
#include <unistd.h>
#include <iostream>
#include <string.h>
#include "rWidgetPlots.h"
class controlRThroughQt : public QWidget
{
Q_OBJECT
QTextEdit *textEdit;
public:
void qtInterface ();
public slots:
void slotPanLeft ();
void slotPanRight ();
void slotPanTop ();
void slotPanBottom ();
void slotZoomIn ();
void slotZoomOut ();
void slotRefresh ();
void findInfoByClicking ();
};
#endif
并将定义移动到单个实现文件:
extern RInside R;
extern RInside & qtToR;
那就行了。啊,我不知道extern也可以被用作w.r.t参考!谢谢,这很有帮助。啊,我不知道extern也可以用作w.r.t参考资料!谢谢,这很有帮助。