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;

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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