Tic Tac Toe

[Dannibe7]

Okay. Here are my instructions. I am not allowed to use Arrays.

Instructions:
You are to create a simulation of a tic-tac-toe game. Each position will be generated randomly based on a seed that is input by the user. The program will print the board, determine if it is a valid board (4 pieces of one and 5 of another, at most one winning pattern), and determine if there is a winner.
1) Prompt for and read in nonnegative user seed (function) Possible invalid entry: Ran out of data. Non-int data. Not nonnegative. When the user enters an invalid seed, the program should not process the rest of the program. Do NOT use exit() or abort() builtin functions. Use a Boolean function for getting the seed. 2) Generate board (function) 3) Print board (function) 4) Determine if valid (function) Possible errors: too many Xs or Os too many winning patterns If it is invalid, the program should not process the rest of the program. Use a Boolean function to determine if valid. 5) Determine if winner, and if so, whom, and if so, where. (function) 6) Print whether there is a winner, and if so, whom, and if so, where. (function)And here is the code that I have so far:

#include <stdio.h>#include <stdbool.h>


bool getInput(int* pInput);
int genBoard(int input);
void printBoard(int input, int topRow, int midRow, int bottomRow, int lCol,
                int midCol, int rCol, int lDiag, int rDiag);
int ifValid(int input, int topRow, int midRow, int bottomRow, int lCol,
            int midCol, int rCol, int lDiag, int rDiag);
int winner(int input, int topRow, int midRow, int bottomRow, int lCol,
           int midCol, int rCol, int lDiag, int rDiag);
void display(int input, int topRow, int midRow, int bottomRow, int lCol,
             int midCol, int rCol, int lDiag, int rDiag);




int main(void)
{
   int input;
   int topRow, midRow, bottomRow;
   int lCol, midCol, rCol;
   int lDiag, rDiag;

bool getInput(int* pInput)
{
   bool success = false;
   int scanRes;


   printf("\nName: Danielle Evans");
   printf("\nPlease enter a nonnegative integer seed: ");
   scanRes = scanf("%d", input);


   if (scanRes == 1)
   {
      int input = *pInput;


      if (input < 0)
      {
          printf("Not nonnegative. ");
      }
      else
         printf("\nRan out of data. ");
   }
   else if (scanRes == 0)
      printf("\nNon-int data. ");


   if(!success)
      printf("\n\n");


   return success;
}


int genBoard(int input)
{
  
}

void printBoard(int input, int topRow, int midRow, int bottomRow, int lCol,
                int midCol, int rCol, int lDiag, int rDiag)
{
}


int ifValid(int input, int topRow, int midRow, int bottomRow, int lCol,
            int midCol, int rCol, int lDiag, int rDiag)
{


}


int winner(int input, int topRow, int midRow, int bottomRow, int lCol,
           int midCol, int rCol, int lDiag, int rDiag)
{


}


void display(int input, int topRow, int midRow, int bottomRow, int lCol,
             int midCol, int rCol, int lDiag, int rDiag)
{


}


return 0;
}

My question is how do I do the genBoard() function and the printBoard() function? Also, is the code that I have so far correct?
Thanks

[rmatze]

Instead of this:

int topRow, midRow, bottomRow;    
int lCol, midCol, rCol;    
int lDiag, rDiag;

do this

int game_board[3][3];

Then use two for loops to fill each spot. Take a look here also Arrays in C and C++ - Cprogramming.com

[GReaper]

Random TicTacToe?! That's new...

Since it's talking about randomness, you must use the stdlib's functions "srand()" for the seed and "rand()" for the random numbers.
Say you have nine variables representing each square of the board, you can set it to "rand() % 2". Zero will be the one symbol, and one will be the other. About the printing and checking part, I guess you can figure them out.

[Dannibe7]

I am not allowed to use an array.

[Dannibe7]

Also, I am only supposed to use the #include stdio.h and #include stdbool.h

[itsme86]

You can't nest your functions inside main(). Move them out.

[Dannibe7]

She made us do a structure chart and she said that all 6 functions are inside of main

[rmatze]

Then you are going to have to print each spot in the correct order, it's not that bad. Since you can't use an array you are going to need a variable for each spot (9 total). I would probably use char's instead of int's and use GReaper's suggestion to fill the spots.

[GReaper]

Also, I am only supposed to use the #include stdio.h and #include stdbool.h

Great... Don't worry, it's a good opportunity to make a Pseudo Random Number's Generator.

EDIT: I forgot, in C you don't have to have a prior declaration. Just call srand and rand and cross your fingers...

[Dannibe7]

isnt the int game_board[3][3] an array?

[CommonTater]

She made us do a structure chart and she said that all 6 functions are inside of main

Did your teacher actually tell you to create nested functions... or dis she by chance say they were "called from main"...

There is a difference.

C does not support nested functions... you cannot create a function inside a function...

Now just on the off chance your teacher did tell you to do that...
You seriously need to get a teacher who knows what he or she is talking about... 'cause yours doesn't.

[Dannibe7]

Well I am assuming that it would be called from main then. but my structure chart has all of the functions coming off of main. So I should take all of these out of main?

[GReaper]

Well I am assuming that it would be called from main then. but my structure chart has all of the functions coming off of main. So I should take all of these out of main?

Exactly.

[iMalc]

You do not make a tic-tac-toe game without using arrays; anyone who suggests to do otherwise is either a moron, or just trying to torture you.
That does not teach you how to program, it teaches you how not to program.

You don't jump into the sea with large juicy steaks tied to yourself in order to keep sharks away do you?! Don't do the opposite of what makes sense and expect to get something of practical value out of it.

[anduril462]

EDIT: I forgot, in C you don't have to have a prior declaration. Just call srand and rand and cross your fingers...

That's a dirty, nasty hack, which I'm sure the teacher wouldn't go for, and just a very bad idea in general. It can actually cause serious problems.

The declaration makes sure types are correct, but in the absence of a declaration, many compilers assume the function returns an int. This means the compiler can't properly check or convert return types for you. It will generate code assuming an int was returned, but that might not jive with what the called function puts on the stack or in a register for returning. Here's an example:

main.c

#include <stdio.h>

double foo(void)
{
    return 123.45;
}

int main(void)
{
    int x;

    x = foo();
    printf("After calling foo, for which the compiler knows the return type, x = %d\n", x);
    x = bar();
    printf("After calling bar, for which the compiler does NOT know the return type, x = %d\n", x);

    return 0;
}

func.c

double bar(void)
{
    return 123.45;
}

Compiling (ignoring the warning) and running gives:

$ gcc -Wall main.c func.c
main.c: In function ‘main’:
main.c:14: warning: implicit declaration of function ‘bar’
$ ./a.out
After calling foo, for which the compiler knows the return type, x = 123
After calling bar, for which the compiler does NOT know the return type, x = 73

If the compiler knew that bar returned double, it would correctly truncate the decimal portion and x would be 123 after calling bar too. This can be verified by putting the prototype for bar at the top of main.c.