// Blur image
void blur(int height, int width, RGBTRIPLE image[height][width])
{
    // Creates the temporary variable to store the data in before we change it; as well as introduces variables RGB sum & incrementing variable 'elements' to divide by
    RGBTRIPLE temp[height][width];
    float redsum;
    float greensum;
    float bluesum;
    float elements;

    // Enters row
    for (int i = 0; i < height; i++)
    {
        // Enters column
        for (int j = 0; j < width; j++)
        {
            // Nullifies the variables
            redsum = 0;
            greensum = 0;
            bluesum = 0;
            elements = 0;
            // Restricts to 1 row below through to 1 above
            for (int x = i - 1; x <= i + 1; x++)
            {
                // Restricts to 1 column to the side through to 1 over
                for (int y = j - 1; y <= j + 1; y++)
                {
                    // Restrict the x and y variables so that they are never < 0 or > matrix_size
                    if ((x >= 0 && x <= height - 1) && (y >= 0 && y <= width - 1))
                    {
                        // Sum up all original red values in the defined matrix
                        redsum += image[x][y].rgbtRed;
                        // Sum up all original blue values in the defined matrix
                        greensum += image[x][y].rgbtGreen;
                        // Sum up all original green values in the defined matrix
                        bluesum += image[x][y].rgbtBlue;
                        // Increment the pixels/elements used
                        elements++;
                    }
                }
            }
            // Store the average RGB values in the temporary variable
            temp[i][j].rgbtRed = round(redsum / elements);
            temp[i][j].rgbtGreen = round(greensum / elements);
            temp[i][j].rgbtBlue = round(bluesum / elements);
        }
    }

    // Enters column
    for (int i = 0; i < height; i++)
    {
        // Enters row
        for (int j = 0; j < width; j++)
        {
                    // Sets the 'selected pixel' to the temporary variables we stored in previously
                    image[i][j].rgbtRed = temp[i][j].rgbtRed;
                    image[i][j].rgbtGreen = temp[i][j].rgbtGreen;
                    image[i][j].rgbtBlue = temp[i][j].rgbtBlue;
        }
    }
    return;
}