i don't know what is wrong when i run the program the output is all zeros

Question

void blur(int height, int width, RGBTRIPLE image[height][width])
{
    double red_sum ;
    double green_sum ;
    double blue_sum ;
    double counter;
    RGBTRIPLE new_image[height][width];
    
     for(int k=0; k < height; k++)
     {
        for(int m=0; m < width; m++)
        {
            new_image[k][m].rgbtGreen = image[k][m].rgbtGreen;
            new_image[k][m].rgbtRed = image[k][m].rgbtRed;
            new_image[k][m].rgbtRed = image[k][m].rgbtBlue;
        }
     }  
    
     for(int i = 0 ; i < height ; i++)
    {
        for(int j = 0; j < width ; j++)
        {
           counter =0;
           red_sum =0;
           blue_sum=0;
           green_sum=0;
           
            for(int box_height = i-1; box_height == i+1 ; box_height++)
            {
                for(int box_width = j-1; box_width == j+1 ; box_width++)
                {
                    if( box_height < 0 || box_width < 0 || box_height == height  || box_width == width)
                    {
                         continue;
                    }
                        red_sum += new_image[box_height][box_width].rgbtRed;
                        blue_sum += new_image[box_height][box_width].rgbtBlue;
                        green_sum += new_image[box_height][box_width].rgbtGreen;
                        counter++;
                }
            }
            image[i][j].rgbtRed = round(red_sum / counter);
            image[i][j].rgbtBlue = round(blue_sum / counter);
            image[i][j].rgbtGreen = round(green_sum / counter);
        }    
    }
}

Answer 1

This looks familiar. Look at the for loop setups:

        for(int box_height = i-1; box_height == i+1 ; box_height++)
        {
            for(int box_width = j-1; box_width == j+1 ; box_width++)

Do these for loops ever actually execute? Does a for loop run while or until the test is true?