Thread: 2d Arrays

Hello I'm confused how to build a 9x9 board using 2d arrays. I attached what my board should look like. I looked at the information online for help but i couldn't really understand. I want to build the board and understand how to print and edit the arrays. If you could help me understand that would be great. this is what i have so far.

Code:

#include <stdio.h>
# define length 9
# define width 9


int main (void){
    int row;
    int col;
    int i=0;
    int count=0;
    int mines;
    int randomseed;

printf("please input your seed: ");
    scanf("%d", &randomseed);


printf("please input the number of mines: ");
    scanf("%d", &mines);

//create the gameboard size
    int gameboard[length][width];

//read in the gameboard file
//for each row
    for(row=0; row<length; row++)
    {
//for each col
        for(col=0; col<width; col++)
        {
            scanf("%d", &i);
            gameboard[row][col]=i;
        }
    }

//check in the readin file
//for each row
    for(row=0; row<length; row++)
    {
//for each col
        for(col=0; col<width; col++)
        {
//prints an X in place of every 1
            if(gameboard[row][col]==1)
            {
                printf("X ");
            }
//prints out the other numbers for how many mines are found by each space
            else
            {
//finds 0's and checks how many X's are around them
                if(gameboard[row][col]==0)
                {
                    count = 0;
                    if(gameboard[row][col+1]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row][col-1]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row+1][col]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row-1][col]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row+1][col+1]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row+1][col-1]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row-1][col+1]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row-1][col-1]==1)
                    {
                        count=count+1;
                    }

                    printf("%d ", count);
                }
            }
        }

        printf("\n");
    }

    printf("\n");
    return 0;
}

Just reposting code after formatting since it is hard to read

Code:

#include <stdio.h>
# define length 9
# define width 9


int main (void)
{
    int row;
    int col;
    int i=0;
    int count=0;
    int mines;
    int randomseed;

    printf("please input your seed: ");
    scanf("%d", &randomseed);


    printf("please input the number of mines: ");
    scanf("%d", &mines);

//create the gameboard size
    int gameboard[length][width];

//read in the gameboard file
//for each row
    for(row=0; row<length; row++)
    {
//for each col
        for(col=0; col<width; col++)
        {
            scanf("%d", &i);
            gameboard[row][col]=i;
        }
    }

//check in the readin file
//for each row
    for(row=0; row<length; row++)
    {
//for each col
        for(col=0; col<width; col++)
        {
//prints an X in place of every 1
            if(gameboard[row][col]==1)
            {
                printf("X ");
            }
//prints out the other numbers for how many mines are found by each space
            else
            {
//finds 0's and checks how many X's are around them
                if(gameboard[row][col]==0)
                {
                    count = 0;
                    if(gameboard[row][col+1]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row][col-1]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row+1][col]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row-1][col]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row+1][col+1]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row+1][col-1]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row-1][col+1]==1)
                    {
                        count=count+1;
                    }
                    if(gameboard[row-1][col-1]==1)
                    {
                        count=count+1;
                    }

                    printf("%d ", count);
                }
            }
        }

        printf("\n");
    }

    printf("\n");
    return 0;
}

You need to be careful about how you check the borders. For example, when "col == 0" don't use "[col - 1]" and when "col == width-1" don't use "[col + 1]".