Passing pointers

Let me walk you through my problem. I have class Test. In a function I have:

Code:

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Test thing;

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Now I call another function and pass thing to it as &thing. That function recieves it as *ttt which is obviously a pointer. Now my problem comes in when I need to pass *ttt to another function. At the moment I have the following:

Code:

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compAI( &row, &column, ttt );

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The function prototype looks as follows:

Code:

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void compAI( int *, int *, TicTacToe * );

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The program compiles, but as it's being linked I get the following error:

Quote:

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main.o(.text+0x113b):main.cpp: undefined reference to `compAI(int*, int*, TicTacToe*)'
make.exe: *** [tictactoe-game.exe] Error 1

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I don't know how to pass a pointer from one function to another and am guessing that I've done it incorrectly. Assistance required please.

Less explanation, more code please. :) I'll assume that by class Test you mean class TicTacToe.

>undefined reference to `compAI(int*, int*, TicTacToe*)'
Have you given compAI a body?

Snippets of code..

Code:

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void onePlayer() {

  TicTacToe game;

  playSingleGame( player1, player2, count, difficulty, &game );

}

void playSingleGame( int p, int p2, int number, int diff, TicTacToe *ttt ) {

  compAI( &row, &column, ttt );

}

void CompAI( int *x, int *y, TicTacToe *ttt ) {

  int b1;

  b1->ttt.getBoard( 0, 0 );

}

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There is obviously much more code in each of the functions, it's just that the compiler won't compile my program successfully. However if I comment out the call to compAI in function playSingleGame the program will compile.

Quote:

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Building Makefile: "C:\Documents and Settings\Dylan v.d Merwe\My Documents\Coding\C++\Work\Complete Projects\TicTacToe\Makefile.win"
Executing make...
make.exe -f "C:\Documents and Settings\Dylan v.d Merwe\My Documents\Coding\C++\Work\Complete Projects\TicTacToe\Makefile.win" all
g++.exe main.o tictactoe.o -o "tictactoe-game.exe" -L"C:/Program Files/Dev-Cpp/lib"

main.o(.text+0x118d):main.cpp: undefined reference to `compAI(int*, int*, TicTacToe*)'

make.exe: *** [tictactoe-game.exe] Error 1

Execution terminated

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If it's all in the same file (main.cpp) make sure there is a prototype of compAI(int*, int*, TicTacToe*) before you call it inside playSingleGame. You could also just define the function compAI before the function playSingleGame.

lol @ jlou. Dude, believe me, I know about prototypes. Look at the red part on my previous program, that is what I think is the problem.

Here are my prototypes for the above mentioned functions:

Code:

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void compAI( int *, int *, TicTacToe * );
void playSingleGame( int, int, int, int, TicTacToe * );
void onePlayer();

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Oh, you must be joking!! I just made a supid typo!!

CompAI instead of compAI. Thanks anyway peeps! :rolleyes:

:D@cyberClown for laughing at jlou for mentioning prototypes when cyberClown didn't check the spelling first! :D ;)

Knowing your code was correct the whole time sure makes it easier to deal with stupid typos, though. :)