small compiler error, much appreciated!

[johndoejohndoe]

(If other header or cpp files are necessary, I will provide them accordingly)

here is the compiler error I'm receiving:

Undefined symbols for architecture x86_64:
"TicTacToe::rungame()", referenced from:
_main in main-672692.o
"TicTacToe::TicTacToe()", referenced from:
_main in main-672692.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

here is my code:

header:

#ifndef ____tictactoe__
#define ____tictactoe__
#include <iostream>
#include "player.h"
#include "cell.h"
#include "date.h"
using namespace std;

class TicTacToe
{
public:
TicTacToe();
TicTacToe(Player [],Player []);
void setplayer();
void Displayboard();
void makeMove();
bool checkWin();
bool validmove();
void chooseplayer();
bool validatebounds(int, int);
bool validatechoice(int, int);
void rungame();
void displayBlank();
void clearBoard();
void stats();


private:
static const int ROW = 3;
static const int COL = 3;
int currentplayer;
static const int DEFAULT_NUM_PLAYERS = 2;
Player p[DEFAULT_NUM_PLAYERS];
Cell board[ROW][COL];
Date d;
int numGamesPlayed, turn;

};

#endif /* defined(____tictactoe__) */

cpp file:

#include "tictactoe.h"
#include "cell.h"
#include "date.h"
#include <iostream>
using namespace std;
int ROW = 3;
int COL = 3;
//Tic Tac Toe default constructor
TicTacToe::TicTacToe()
{
cout << "Welcome to my TicTacToe Program!" << endl;
turn=0;
currentplayer=0;
numGamesPlayed = 0;
d.input();

}
//Function to input player information and assign a marker to each player
void TicTacToe::setplayer()
{
cout << "Player 1 please input your information:\n";
p[0].input();
cout << endl;
cout << "Player 2 please input your information:\n";
p[1].input();
cout << p[currentplayer].gethandle() <<", what marker would you like to use? " << endl;
cout << "\t1. X" << endl << "\t2. O\n";
int choice;
cin >> choice;
switch (choice) {
case 1:
p[0].setmarker('X');
p[1].setmarker('O');
break;
case 2:
p[0].setmarker('O');
p[1].setmarker('X');
break;
default:
p[0].setmarker('X');
p[1].setmarker('O');
break;
}

}
//Function that chooses which player's turn it is
void TicTacToe::chooseplayer()
{
if(turn%2==0)
{
currentplayer = 0;
}
else
currentplayer = 1;
}
//Display board function
void TicTacToe::Displayboard(){
int i = 0;
int r = 0;

for ( i = 0; i < COL; i++)
{
for (r = 0; r < ROW; r++)
{
if (r < ROW-1)
{
cout << board[i][r].getmarker() << " | ";
}
else
{
cout << board [i][r].getmarker() << endl;
if(i !=COL-1){
cout << "---------------";
cout << endl;
}
else
cout << endl;
}
}

}
}
//Function to allow player to make move
//Function validates if the choice is within the bounds and if it has chosen already
void TicTacToe::makeMove(){
int x,y;
do{
cout << p[currentplayer].gethandle() << ", please enter the space of the coordinates (ROW,COL)" << endl;
cin >> x >> y;
}while(!(validatebounds(x, y)&&validatechoice(x, y)));
board[x-1][y-1].setmarkers(p[currentplayer].getmarker());
}
//Validation functions
bool TicTacToe::validatebounds(int x, int y)
{
bool validate = true;
if(x<0||x>COL)
{
validate = false;
cout << "Your entry was invalid" << endl;
}
if(y<0||y>ROW)
{
validate = false;
cout << "Your entry was invalid" << endl;
}
return validate;
}
bool TicTacToe::validatechoice(int x, int y)
{
bool validate = true;
if(board[x-1][y-1].getmarker() == 'O' || board[x-1][y-1].getmarker()== 'X')
{
validate = false;
cout << "Please choose another space, this one has been taken" << endl;
}

return validate;
}
//Function to check for wins
bool TicTacToe::checkWin()
{
bool winner(false);
int x;
//Checks for wins on diagonals
if (board[0][0].getmarker() != ' ' && board[0][0].getmarker() == board[1][1].getmarker() && board[0][0].getmarker() == board[2][2].getmarker())
return winner = true;

else if(board[ROW][0].getmarker() != ' ' && board[ROW][0].getmarker() == board[1][1].getmarker() && board[ROW][0].getmarker() == board[0][ROW].getmarker())
return winner = true;

//Checks for wins in rows
for(x = 0; x < ROW; x++){
if (board[x][0].getmarker() != ' ' && board[x][0].getmarker() == board[x][1].getmarker() && board[x][0].getmarker() == board[x][2].getmarker())
return winner = true;
}
//Checks for wins in columns
for(x = 0; x < COL; x++)
{
if(board[0][x].getmarker() != ' ' && board[0][x].getmarker() == board[1][x].getmarker() &&board[1][x].getmarker() && board [0][x].getmarker() == board[2][x].getmarker())
return winner = true;
}
return(winner);
}
//Run game function
void TicTacToe::rungame()
{
char ans;
bool validate = false;
bool endgame = false;
setplayer();
do{
displayBlank();
do{
makeMove();
Displayboard();
turn++;
if(turn==9)
{
validate = true;
if(!checkWin())
{
cout << "TIE" << endl;
}
}
if (turn>4)
{
if(checkWin())
{
validate=true;
cout << p[currentplayer].gethandle() << " wins!" << endl;
p[currentplayer].increasewins();

}

}
chooseplayer();
}while (!validate);
numGamesPlayed++;
clearBoard();
stats();
turn=0;
cout << "Would you like to play again?(Y/N)";
cin >> ans;
if(ans=='n' || ans=='N')
{
endgame=true;
clearBoard();
}
}while(!endgame);

}
//Initializes board to blank
void TicTacToe::displayBlank()
{
for(int x=0; x<COL;x++){
for (int y = 0; y<ROW; y++) {
if(y==ROW-1)
{
cout << " ";
}
else
cout << " " << "|";
}
if (x==COL-1) {
cout << endl;
}
else
{
cout << endl << "-----------------" << endl;
}
}
}
//Function to clear board after game has ended
void TicTacToe::clearBoard()
{
for (int x = 0; x < COL; x++)
for (int y = 0; y < ROW; y++)
board[x][y].setmarkers(' ');
}
//Function to display end stats for game
void TicTacToe::stats()
{

cout << "Games Played: " << numGamesPlayed << endl;

}

main driver:

#include <iostream>
#include "player.h"
#include "cell.h"
#include "tictactoe.h"
using namespace std;

int main()
{
TicTacToe t;
t.rungame();

}

[Moschops]

This isn't a compiler error. It's a link error.

It means that at the point when your linker is trying to stick all your compiled files together, some things are missing. In this case, the linker can't find all those functions in your larger cpp file, in any of the compiled object files it has been told to stick together.

The problem is one of these:

1) Your build command line is missing a file (if you're doing the build yourself).
2) If you're using an IDE, you haven't put everything in the "project" or whatever your IDE calls collections of source code files.
3) You've installed bad/conflicting versions of compilers/linkers and they're not working well together

While I'm here, I see you've put using namespace std; in a header file. This is a very very very bad idea indeed and you shouldn't do it.

[AbstractionAnon]

To be more specific, it does not appear that you compiled tictactoe.cpp.

main() makes two references to your class.
Line 10: it calls TicTacToe's constructor. TicTacToe::TicTacToe()
Line 11: it calls TicTacToe::rungame().
These are exactly the two functions that the linker can not find.

Both exist in your .cpp file, so the only conclusion is that the linker did not find tictactoe.o (the object file from the compile of the .cpp file). This could be for one of several reasons:
1) the .cpp file has errors and did not produce an object file
2) the object file in the wrong place
3) the .o file did not get included in the list of files needed to produce an executable.