I have been trying to figure out where this is comming from:

1>main.obj : error LNK2019: unresolved external symbol "public: void __thiscall StudentList::getStream(class std::basic_ifstream<char,struct std::char_traits<char> > *)" (?getStream@StudentList@@QAEXPAV?$basic_ifstream@DU?$char_traits@D@std@@@std@@@Z) referenced in function _main
1>main.obj : error LNK2019: unresolved external symbol "public: __thiscall StudentData::StudentData(void)" (??0StudentData@@QAE@XZ) referenced in function "public: __thiscall StudentList::StudentList(void)" (??0StudentList@@QAE@XZ)

one of them is realted to the


line of code just before "return 0;", because when ever I comment it out, one of the error messages dissappears.

Here is the main function:

#include "InFile.h"
#include "StudentList.h"

int main()
	char dataString[200]={"studentList10.csv"};  //Default name of file
	ifstream *dataStream;
	StudentList list;
	InFile data;

//open file

//and check that it is valid
	if (data.fileOpenError())
		cout << "ERROR" << endl
		<< "File, " << dataString << " was not opened successfully" << endl;
		exit( 1 );
		cout << "File, " << dataString << " was opened successfully" << endl;


	dataStream = data.getDataStream();

	return 0;

I am pretty sure that InFile is not presenting issues, but whenever I uncomment two lines in the "StudentList.h" header file related to the "StudentData" class I get the other error.

Here are the respective header file for StudendList.h and StudentData.h


#include "studentData.h"
#include <fstream>
using std::ifstream;

class StudentList
	void getRawRecord(char * record);
	void getStream(ifstream * dStream);
	void readRawRecord();
	StudentData studentLongList[500];

	char * rawRecord;
	StudentData tempStudent;
	ifstream * data;


#include <string>
using std::string;

class StudentData
// Default constructor
//input constructor
	StudentData(string lName, string fName, unsigned short idnt, string dCode, string sCode, string cCode);

//functions that access items which uniquely define a student
	void setFirstName(string fName);
	void setLastName(string lName);
	void setID(int idnt);
	string getFirstName();
	string getLastName();
	unsigned short getID();

//codes to define groups a student belongs to
//duo team, family, and club
	void setDuoCode(string dCode);
	void setSiblingCode(string sCode);
	void setClubCode(string cCode);
	string getDuoCode();
	string getSiblingCode();
	string getClubCode();

//if a student is competing in a category this value is true
	bool persuasive;
	bool oo;
	bool oi;
	bool dramatic;
	bool humorous;
	bool duo;
	bool thematic;
	bool impromptu;
	bool extemporaneous;
	bool apologetics;

/*this is for the list of other students competed against each
if you have competed in the same room as another student you
both have identical room codes
	string persuasiveRoomCode[10];
	string ooRoomCode[10];
	string oiRoomCode[10];
	string dramaticRoomCode[10];
	string humorousRoomCode[10];
	string duoRoomCode[10];
	string thematicRoomCode[10];
	string impromptuRoomCode[10];
	string extemporaneousRoomCode[10];
	string apologeticsRoomCode[10];

/*this list defines the students average placement in room order
	float persuasiveRoomOrder;
	float ooRoomOrder;
	float oiRoomOrder;
	float dramaticRoomOrder;
	float humorousRoomOrder;
	float duoRoomOrder;
	float thematicRoomOrder;
	float impromptuRoomOrder;
	float extemporaneousRoomOrder;
	float apologeticsRoomOrder;

//this function is used for initializing category room codes
	void categoryInitializer(bool category);
	void roomCodeInitializer(string rCode[]);
	void roomOrderInitializer(float rOrder);
//items which uniquely define a student
	string firstName;
	string lastName;
	unsigned short ID;

//codes to define groups a student belongs to
//duo team, family, and club
	string duoCode;
	string siblingCode;
	string clubCode;
6 Years
Discussion Span
Last Post by Salem

Im not going to bother reading all that code, but if you enter in your error code at msdn.com in the search box, you can usually get an answer.


> No, I have the implementation code in separate files.
Then you didn't include the separate file in your project.

The project needs a list of all your .cpp files.

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