c – 没有在类中声明的成员函数 – 基本编译时出错

注意：我添加了#include< string>在Event.h中,错误仍然存??在.

Event.cpp

#include "Event.h"
#include <string>

std::string Event::getLabel() {
    return label;
}

Event.h

#ifndef EVENT_H
#define EVENT_H

#define EVENT_STOP 0
#define EVENT_START 1


class Event {
private:

protected:
    double time;
    std::string label;
    int type; // EVENT_START OR EVENT_STOP

public:
    std::string getLabel(); 

};

#endif

编译和错误

g++ -c -Wall -pedantic correngine.cpp
g++ -c -Wall -pedantic CSVManager.cpp
g++ -c -Wall -pedantic ServerEvent.cpp 
g++    -c -o UPSEvent.o UPSEvent.cpp
g++ -c -Wall -pedantic CorrelationEngineManager.cpp
g++ -c -Wall -pedantic Event.cpp
Event.cpp:4: error: no ‘std::string Event::getLabel()’ member function declared in class ‘Event’
make: *** [Event.o] Error 1