PSET4用于CS50X，模糊功能

Question

我是编码的入门者，我开始使用CS50学习，但是我有问题，我写了模糊功能，而且看起来很好，图像实际上是模糊的，但是当我使用Test50（CS50上的代码测试工具）时，它说我没有正确处理RGB信息。请帮助我查看代码。 这是代码

// Blur image
void blur(int height, int width, RGBTRIPLE image[height][width])//average rgb value of pixels arounds (9 if not on the edge)
{
    int a_blue = 0, a_green = 0, a_red =0;
    for(int i = 0; i < width; i++)
    {
        for(int j = 0; j < height; j++)
        {
            int left = i - 1, right = i + 1, upper = j - 1, down = j + 1, time = 0; //
            int blue = 0, red = 0, green = 0;
            _Bool cnd = (left >= 0 && right <= width && upper >= 0 && down <= height);
            for(int t1 = i-1; t1 <= i + 1; t1++)
            {
                if(!cnd)
                {
                    continue;
                }
                for(int t2 = j - 1; t2 <= j + 1; t2++)
                {
                    if(!cnd)
                    {
                        continue;
                    }
                    //sum of all blue around
                    blue = blue + image[t2][t1].rgbtBlue;;
                    //sum of all red around
                    red = red + image[t2][t1].rgbtRed;
                    //sum of all green around
                    green = green + image[t2][t1].rgbtGreen;
                    time++;
                }
            }
            a_blue = rounding((float)blue/time);
            a_green = rounding((float)green/time);
            a_red = rounding((float)red/time);

            for(int t1 = i-1; t1 <= i + 1; t1++)
            {
                if(!cnd)
                {
                    continue;
                }
                for(int t2 = j - 1; t2 <= j + 1; t2++)
                {
                    if(!cnd)
                    {
                        continue;
                    }
                    //sum of all blue around
                    image[t2][t1].rgbtBlue = a_blue;
                    //sum of all red around
                    image[t2][t1].rgbtRed = a_red;
                    //sum of all green around
                    image[t2][t1].rgbtGreen = a_green;

                }
            }


        }
    }
    return;
}

，这是我查看答案时test50和btw的结果

:( blur correctly filters middle pixel
    expected "127 140 149\n", not "87 95 124\n"
:( blur correctly filters pixel on edge
    expected "80 95 105\n", not "100 109 110\n"
:( blur correctly filters pixel in corner
    expected "70 85 95\n", not "127 140 149\n"
:( blur correctly filters 3x3 image
    expected "70 85 95\n80 9...", not "127 140 149\n1..."
:( blur correctly filters 4x4 image
    expected "70 85 95\n80 9...", not "123 136 145\n1..."

，我发现有些人更喜欢键入每一行而不是使用循环，如果我想成为一名教授编码工程师，您能告诉我哪个是更好的编码习惯？