u/Beautiful_Welder5374

Every time I run check 50 in the terminal it always tells me that :

:( recovers 000.jpg correctly

000.jpg not found

:( recovers middle images correctly

001.jpg not found

:( recovers 049.jpg correctly

049.jpg not found

:| program is free of memory errors

can't check until a frown turns upside down

But I don't know how to solve that yet . Can anyone help me in that?

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>


int main(int argc, char *argv[])
{
     // Accept a single command-line argument
     if(argc != 2)
     {
        printf("usage: ./recover FILE\n");
            return 1;
     }


    // Open the memory card
    FILE *card = fopen(argv[1], "r");
    if(card == NULL)
    {
        printf("Couldn't open the file\n");
    }
    //Create a buffer for a block of data
    uint8_t buffer[512];
    // While there's still data left to read from the memory card
    char *recard = malloc(3 * sizeof(char));
    int i = 0;
    int if1st = 0;
    FILE *img;
    while(fread(buffer, 1, 512,card) == 512)
    {
        // Create JPEGs from the data
        if(buffer[0] == 0xff && buffer[1] == 0xd8 && buffer[2] == 0xff && (buffer[3] & 0xf0) == 0xe0)
        {
            if(if1st == 0)
            {
                sprintf(recard, "%03i.jbg", i);
                img = fopen(recard, "w");
                fwrite(buffer, 1, 512, img);
                i++;
                if1st = 1;
            }
            else
            {
                fclose(img);
                sprintf(recard, "%03i.jbg", i);
                img = fopen(recard, "w");
                fwrite(buffer, 1, 512, img);
                i++;
            }


        }


    }
    fclose(card);
    free(recard);
}

For someone who taking his first CS course ever but my plan is to continue in this field and be as good as possible in programming which one should I choose to solve every week should I choose the uncomfortable problem set or the comfortable one But again I just wanna to improve myself and be as good as possible.