Hi Blauelf!

Thanks for your help!!!! You are right - when I have rewritten the code using if condition - it works but only visually. But when I proceed check50 it doesnt(

Now it looks like:

if (t<1) { int s=lroundf(1/t); // iterate over the rows in the scanline for (int i = 0; i < biHeight_old; i++) { //take only every s-th row if (i%s==0) { int counter =0; // iterate over pixel in scanline for (int j = 0; j < biWidth_old; j++) { // temporary storage RGBTRIPLE triple;

                // read RGB triple from infile
                fread(&triple, sizeof(RGBTRIPLE), 1, inptr);
                //take only every s-th element
                if (j%s==0)
                {
                    // storing pixels in memory
                    buffer[counter] = triple;
                    counter++;
                }
                // skip over every not-s-th element in the  row i
                else
                {
                    fseek(inptr, s-1, SEEK_CUR);
                }
            }

            // skip over padding, if any
            fseek(inptr, padding_old, SEEK_CUR);

            // write new pixels to outfile
            fwrite(buffer, sizeof(RGBTRIPLE), bi.biWidth, outptr);
            // add padding to output
            for (int k = 0; k < padding; k++)
            {
                fputc(0x00,outptr);
            }
        }
        // skip over every not-s-th row
        else
        {
            fseek(inptr, (s-1)*biWidth_old, SEEK_CUR);
        }
    }
}

Do you think that it is possible to make changes to this code in order to pass the check50 tests or just try totaly another way?