Untitled

// Blur image
void blur(int height, int width, RGBTRIPLE image[height][width])
{
    // create a copy of image, so we can calculate averages and
    // change pixels without interfering with other pixels' blur

    RGBTRIPLE copy[height][width];
    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < width; j++)
        {
            copy[i][j] = image[i][j];
        }
    }

    // read pixels' colors
    int sumRed, sumGreen, sumBlue = 0;
    double averageRed, averageGreen, averageBlue = 0;
    int lastIndexInRow = width - 1;
    int lastIndexInColumn = height - 1;
    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < width; j++)
        {
            // catching each corner (4 pixel grid)
            if ((i == 0 && j == 0)
            {
                sumRed = copy[i][j].rgbtRed + copy[i][j+1].rgbtRed + copy[i+1][j].rgbtRed + copy[i+1][j+1].rgbtRed;
                sumGreen = copy[i][j].rgbtGreen + copy[i][j+1].rgbtGreen + copy[i+1][j].rgbtGreen + copy[i+1][j+1].rgbtGreen;
                sumBlue = copy[i][j].rgbtBlue + copy[i][j+1].rgbtGreen + copy[i+1][j].rgbtGreen + copy[i+1][j+1].rgbtGreen;

                averageRed = round(sumRed / (double) 4);
                averageGreen = round(sumGreen / (double) 4);
                averageBlue = round(sumBlue / (double) 4);
            }

            else if (i == 0 && j == lastIndexInRow)
            {
                sumRed = copy[i][j].rgbtRed + copy[i][j-1].rgbtRed + copy[i+1][j-1].rgbtRed + copy[i+1][j].rgbtRed;
                sumGreen = copy[i][j].rgbtGreen + copy[i][j-1].rgbtGreen + copy[i+1][j-1].rgbtGreen + copy[i+1][j].rgbtGreen;
                sumBlue = copy[i][j].rgbtBlue + copy[i][j-1].rgbtGreen + copy[i+1][j-1].rgbtGreen + copy[i+1][j].rgbtGreen;

                averageRed = round(sumRed / (double) 4);
                averageGreen = round(sumGreen / (double) 4);
                averageBlue = round(sumBlue / (double) 4);
            }

            else if (i == lastIndexInColumn && j == 0)
            {

            }

            else if (i == lastIndexInColumn && j == lastIndexInRow)
            {

            }

            // catching edges (6 pixel grid)
            else if ()
            {

            }

            ..
            ..

            else () // catching body (9 pixel grid)
            {

            }

        }
    }

    return;
}