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so I was trying to solve this recover problem from cs50.IT compiles well but it shows me this following problem :) recover.c exists. :) recover.c compiles. :) handles lack of forensic image :( recovers 000.jpg correctly
000.jpg not found :( recovers middle images correctly
001.jpg not found

:( recovers 049.jpg correctly
    049.jpg not found
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

typedef uint8_t BYTE;
int main(int argc, char *argv[])
{
    FILE *file = fopen(argv[1],"rb");
   // if command line arguments are not appropriate
   if (argc != 2)
   {
        return 1;


   }
   if (file == NULL)
   {
    return 1;

   }
   int const BLOCK_SIZE = 512;
   int count = 0 ;
   char filename[9];
   FILE *img = NULL;
   BYTE buffer[BLOCK_SIZE];


   //going through loop to write the lost files
   while(fread(buffer , sizeof(BLOCK_SIZE) , 1 , file) == 512 )
   {

    if (buffer[0] == 0xff && buffer[1] == 0xd8 && buffer[2] == 0xff && (buffer[3] & 0xf0) == 0xe0)
        {
            if (count == 0)
            {
                // first jpeg

                sprintf(filename , "%03i.jpeg" , count );
                img = fopen(filename,"w");
                fwrite(buffer , sizeof(buffer) , 1 , img);
                count++;




            }
            else if (count > 0 && buffer[0] != 0xff && buffer[1] != 0xd8 && buffer[2] != 0xff && (buffer[3] & 0xff) != 0xe0 )
            {

                  //write new one
                fclose(img);
                sprintf(filename, "%03i.jpeg" , count);
                img = fopen(filename , "w");
                fwrite(buffer , sizeof(buffer) , 512 , img);
                count++;


            }
            else if (count > 0)
            {

 //keep wiritng the current image
                fwrite(buffer , sizeof(buffer) , 512 , img);



            }









        }

        fclose(img);
        fclose(file);






   }






}

1 Answer 1

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It's always the little things. ;-)

Simple problem. The filename extension is supposed to be "jpg", not "jpeg". Lose the "e" in the filename creation statement.

If this answers your question, please click on the check mark to accept. Let's keep up on forum maintenance. ;-)

1
  • Problem still persists­čśö Commented Sep 10, 2022 at 8:38

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