Thread: Tic Tac Toe

It wont magically test itself. You have to write your program to use your functions, then you test and see if they behave according to the assignment. You don't call any of your functions from main, so when you do ./a.out, your program doesn't actually do anything. You need to add code to main to call your functions so you can test if they work. Add a call to your getInput function, then compile and run your program. Does it do the right thing or produce the right error message when you enter "foo" or -123 or 42?

So far this seems better.

Code:

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


bool getInput(int* pInput);
int genBoard(int input);
void printBoard(int topL, int topC, int topR, int cenL,
                int cenC, int cenR, int botL, int botC, int botR);
bool ifValid(int topL, int topC, int topR, int cenL, int cenC,
             int cenR, int botL, int botC, int botR);
int winner(int topL, int topC, int topR, int cenL, int cenC,
             int cenR, int botL, int botC, int botR);
void display(int topL, int topC, int topR, int cenL, int cenC,
             int cenR, int botL, int botC, int botR);


int main(void)
{
   int input;
   int topL, topC, topR;
   int cenL,cenC, cenR;
   int botL, botC, botR;


   if (getInput(&input))
      display(topL, topC, topR, cenL, cenC, cenR, botL, botC, botR);


   return 0;
}


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


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


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


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


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


   return success;
}




int genBoard(int input)
{
   int topL = rand() % 2;
   int topC = rand() % 2;
   int topR = rand() % 2;
   int cenL = rand() % 2;
   int cenC = rand() % 2;
   int cenR = rand() % 2;
   int botL = rand() % 2;
   int botC = rand() % 2;
   int botR = rand() % 2;


   int x, o;
   x = 0;
   o = 1;


}


void printBoard(int topL, int topC, int topR, int cenL,
                int cenC, int cenR, int botL, int botC, int botR)
{
   printf(" %c | %c | %c ", topL, topC ,topR);
   printf(" %c | %c | %c ", cenL, cenC, cenR);
   printf(" %c | %c | %c ", botL, botC ,botR);
}


bool ifValid(int topL, int topC, int topR, int cenL,
             int cenC, int cenR, int botL, int botC, int botR)
{
   int total= topL + topC + topR + cenL + cenC+ cenR + botL + botC + botR;
   if(total !=4 && total !=5)
      return false;
}


int winner(int topL, int topC, int topR, int cenL, int cenC,
             int cenR, int botL, int botC, int botR)


{


}


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


}

I'm not sure how the user is supposed to get the "Ran out of Data" reply though.

Originally Posted by Dannibe7

I'm not sure how the user is supposed to get the "Ran out of Data" reply though.

Me neither. You'll have to check with your teacher or TA.

Code:

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

That can never be true. The only way to get to that if statement is if scanRes is 1. Actually, as a temporary solution to get you moving, just do the following:

Code:

if (input < 0)
{
    printf("Not nonnegative.");
}
else
{
    success = true;  // they entered a number and it's nonnegative, sounds like a winner to me
}

Regarding your genBoard function, you need to ditch the x and o bit entirely. Also, each "square" on your board needs to be passed in as a pointer to genBoard, so that the changes can be "passed back" to your main function. Here's what the function signature should look like:

Code:

int genBoard(int *topL, int *topC, ..., int *botR)

When you call it from main, you need to pass the address of the topR, etc variables so that genBoard can change them and have the changes be available in main.

printBoard has it's own problems. Each square will have a value of 0 or 1. Those numbers correspond to the ASCII characters null and start of header. Those characters don't actually show up on the screen. You need to check each square. If it's a 0, print an 'O', if it's a 1, print an 'X'. You also need to print a new line between each row of your game board.

So would my printboard be something like this?

Code:

if ( *pTopL == 0)
      {
         printf("\nX");
      }
      else printf("\nO");

and then repeated for all 9 spaces?

Thanks

Originally Posted by Dannibe7

So would my printboard be something like this?

Code:

if ( *pTopL == 0)
      {
         printf("\nX");
      }
      else printf("\nO");

and then repeated for all 9 spaces?

Thanks

Almost, but you don't want that \n before each character. Only between each row. I would write another function that returns an 'X' or an 'O' based on whether a square is 0 or 1, and call that from my main print function:

Code:

char outputChar(int square)
{
    if (square)
        return 'X';
    else
        return 'O';
}

void printBoard(int topL, int topC, int topR, ..., int botR)  // no need for pointers here
{
    printf(" %c | %c | %c \n", outputChar(topL), outputChar(topC), ...);
    // same for middle and bottom rows
}

our program can only be the seven functions that I already have set up. is there a way to do all that all inside the print function?

Okay so this is what I have now, I don't know where to go from here and I am sure that there are mistakes. I just don't know where. This is so confusing.

Code:

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


bool getInput(int* pInput);
int genBoard(int* pTopL, int* pTopC, int* pTopR, int* pCenL,
             int* pCenC, int* pCenR, int* pBotL, int* pBotC, int* pBotR);
void printBoard(int* pTopL, int* pTopC, int* pTopR, int* pCenL,
                int* pCenC, int* pCenR, int* pBotL, int* pBotC, int* pBotR);
bool ifValid(int topL, int topC, int topR, int cenL, int cenC,
             int cenR, int botL, int botC, int botR);
int winner(int topL, int topC, int topR, int cenL, int cenC,
           int cenR, int botL, int botC, int botR);
void display(int topL, int topC, int topR, int cenL, int cenC,
             int cenR, int botL, int botC, int botR);


int main(void)
{
   int input;
   int topL, topC, topR;
   int cenL,cenC, cenR;
   int botL, botC, botR;


   if (getInput(&input))
      display(topL, topC, topR, cenL, cenC, cenR, botL, botC, botR);
   return 0;
}

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


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


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


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


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


   return success;
}

int genBoard(int* pTopL, int* pTopC, int* pTopR, int* pCenL,
             int* pCenC, int* pCenR, int* pBotL, int* pBotC, int* pBotR)
{
   *pTopL = rand() % 2;
   *pTopC = rand() % 2;
   *pTopR = rand() % 2;
   *pCenL = rand() % 2;
   *pCenC = rand() % 2;
   *pCenR = rand() % 2;
   *pBotL = rand() % 2;
   *pBotC = rand() % 2;
   *pBotR = rand() % 2;
}

void printBoard(int* pTopL, int* pTopC, int* pTopR, int* pCenL,
                int* pCenC, int* pCenR, int* pBotL, int* pBotC, int* pBotR)
{
   if ( *pTopL == 0)
      {
         printf("X");
      }
      else printf("O");


   if ( *pTopC == 0)
      {
         printf("X");
      }
      else printf("O");


   if ( *pTopR == 0)
      {
         printf("X");
      }
      else printf("O");


   if ( *pCenL == 0)
      {
         printf("X");
      }
      else printf("O");


   if ( *pCenC == 0)
      {
         printf("X");
      }
      else printf("O");
if ( *pCenR == 0)
      {
         printf("X");
      }
      else printf("O");


   if ( *pBotL == 0)
      {
         printf("X");
      }
      else printf("O");


   if ( *pBotC == 0)
      {
         printf("X");
      }
      else printf("O");


   if ( *pBotR == 0)
      {
         printf("X");
      }
      else printf("O");


   printf(" %c | %c | %c \n", *pTopL, *pTopC, *pTopR);
   printf(" %c | %c | %c \n", *pCenL, *pCenC, *pCenR);
   printf(" %c | %c | %c \n", *pBotL, *pBotC, *pBotR);
}


bool ifValid(int topL, int topC, int topR, int cenL,
             int cenC, int cenR, int botL, int botC, int botR)
{
   int total= topL + topC + topR + cenL + cenC+ cenR + botL + botC + botR;


   if(total !=4 && total !=5)
      return false;
}
int winner(int topL, int topC, int topR, int cenL, int cenC,
           int cenR, int botL, int botC, int botR)


{


}


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


}

So to determine a winner would I just have to do a lot of if statements?

Originally Posted by Dannibe7

So to determine a winner would I just have to do a lot of if statements?

A LOT of if() statements.

Okay so how can I set the topL topC and topR to the topRow?
That would be the winning pattern of topRow. I guess this would be going into the int winner() function

Interesting.