Question

我正在尝试做一个任务，程序在我的家里编译得很好 PC（Netbeans）但是当我尝试在Uni Sun盒子上编译时，我得到以下错误

编译标志：g ++ -lm -ansi -Wall -pedantic skyhigh.cpp -o skyhigh

Undefined                       first referenced
 symbol                             in file
Flight::GetSeats()                  /var/tmp//cc49OAwj.o
Flight::GetCost()                   /var/tmp//cc49OAwj.o
Flight::GetAircraft()               /var/tmp//cc49OAwj.o
ld: fatal: Symbol referencing errors. No output written to skyhigh
collect2: ld returned 1 exit status

我非常感谢任何帮助，因为我花了好几个小时梳理互联网解决方案

FLIGHT.H文件

        //
// flight.h
//
// Parent Flight class
//

#ifndef __FLIGHT_H__
#define __FLIGHT_H__

#include<iostream>
#include<string>
using namespace std;
/*TO DO  REQUIRED HEADER FILES AND NAMESPACES*/


class Flight
{

protected:

   string aircraft;
   string category;
   int seats;
   double cost;




public:
   virtual ~Flight(){};

  // virtual void Display() =0;
   void SetAircraftType(string air);
  string GetAircraft();
  int GetSeats();
  double GetCost();
  void SetSeats(int seat);





 //TO DO
  // Prototypes of all the Item functions

};

#endif


FLIGHT.CPP FILE


        #include "flight.h"



 string Flight::GetAircraft(){

    return aircraft;

 }
 int Flight::GetSeats(){


    return seats;
 }

 double Flight::GetCost(){


    return cost;
 }
 void Flight::SetSeats(int seat){

    seats=seat;

 }
void Flight::SetAircraftType(string category){


   aircraft = category;
}


MAIN FILE

// skyhigh.cpp for CPT 323 Assignment 1 SP3 2013
//
//
// CPT323 2013  assignment 1



#include "skyhigh.h"


/////////////////////////////////////////////////////
int main()
{
   Flight newflight ;

   cout<< "Plane Name:" <<newflight.GetAircraft()<< " Seats: "<< newflight.GetSeats()<<"Cost: "<<newflight.GetCost()<< endl;


   Scenic newflight2 ;

  //cout<< "Plane Name:" <<newflight2.GetAircraft()<< " Seats: "<< newflight2.GetSeats()<<"Cost: "<<newflight2.GetCost()<< endl;

  //Scenic* sptr=&newflight2;

  //BookingSheet booking;

  //cout<< booking.GetDay()<<booking.GetTime()<<booking.GetPassengerName()<<booking.GetPaymentStatus()<<endl;

   int finished = 0;  

   do {
      /*Create array for use in menu options*/




   cout << "Main Menu : " <<endl;
   cout << "1) Add a flight booking "<<endl;
   cout << "2) Remove a flight booking "<<endl;
   cout << "3) View current booking sheet " <<endl;
   cout << "0) Exit \n" <<endl;

  cout<< "Please make a selection (0-3) ";


  int selection;
  cin>> selection;

  /*Capture user selection default in switch statement validates 1-9*/
//   fgets(option,sizeof(option),stdin);
// 
// 
   switch (selection) {
       case 0: 

        cout << "Thanks for using the SkyHigh Booking System"<<endl;

        finished=1;
           break;
        case 1: 

        cout << "1) Add a flight booking "<<endl;


           break;
        case 2:

         cout << "2) Add Customer "<<endl;

            break;


      case 3:

         cout << "3) Display Stock " <<endl;

           break;


        default:
            printf("Valid input is 0-3 \n");

    }

    }
   while(!finished);


return 0;
}

生成文件

skyhigh: skyhigh.o utility1.o flight.o scenic.o aerobatic.o
    g++ skyhigh.o utility1.o flight.o scenic.o aerobatic.o -o skyhigh

skyhigh.o: skyhigh.cpp skyhigh.h flight.h aerobatic.h scenic.h
    g++ -ansi -Wall -pedantic -gstabs -c skyhigh.cpp

utility1.o: utility1.cpp utility1.h
    g++ -ansi -Wall -pedantic -gstabs -c utility1.cpp

flight.o: flight.cpp flight.h aerobatic.h scenic.h
    g++ -ansi -Wall -pedantic -gstabs -c flight.cpp

scenic.o: scenic.cpp scenic.h 
    g++ -ansi -Wall -pedantic -gstabs -c scenic.cpp

aerobatic.o: aerobatic.cpp aerobatic.h 
    g++ -ansi -Wall -pedantic -gstabs -c aerobatic.cpp



clean:
    rm -f *.o core *.report *.errs

Answer 1

找不到定义缺失函数的目标文件。确保添加生成的目标文件以进行链接。类似的东西（主要是exec名称和main.o是具有main函数的对象，根据需要更改它们）：

g++ -o main main.o skyhigh.o utility1.o flight.o scenic.o aerobatic.o

C ++获取未定义的符号错误

1 个答案: