recover v0

#include <cs50.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

// jpegs always have a header 0xFF 0xD8 0xFF 0xEn where n can equal 0 through F

typedef uint8_t BYTE;

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");

    // Create a buffer for a block of data
    BYTE buffer[512];

    int count = 0;
    char *filename = "000.jpg";
    FILE *img = fopen(filename, "w");
    printf("Initialized\n");


    // While there's still data left to read from the memory card
    while (fread(buffer, 1, 512, card) == 512)
    {


        // if start of jpeg
        if (buffer[0] == 0xFF && buffer[1] == 0xD8 && buffer[2] == 0xFF && (buffer[3] & 0xF0) == 0xE0)
        {
            printf("line 39\n");
            // if not first jpeg
            if (count)
            {
                // close current file
                printf("entered count if\n");
                fclose(img);
                printf("closed img\n");
                // open new file "###.jpg"
                sprintf(filename, "%03i.jpg", count);
                printf("printed to filename %s\n", filename);
                img = fopen(filename, "w");
                printf("opened %s\n", filename);
            }
            printf("line 53\n");
            count++;
        }
        // else
        else
        {
            printf("line 59\n");
            // if already found jpeg
            if (count)
            {
                //keep writing to it
                fwrite(buffer, 1, 512, img);
            }
        }
    }
    // close remaining files
    fclose(img);
    fclose(card);
}