recover does not work

/**
 * recover.c
 *
 * Computer Science 50
 * Problem Set 4
 *
 * Recovers JPEGs from a forensic image.
 */

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

int main(void)
{

    // open input file
    FILE* inptr = fopen("card.raw", "r");
    if (inptr == NULL)
    {
        printf("Could not open %s.\n", "card.raw");
        return 2;
    }
    // read from file 512 bites each time until EOF
    unsigned char buffer[512];
    int writemode = 0;
    int num = 0;
    char name[10];

    while (!feof(inptr))
    {
        if(writemode == 0)
        {
           fread(&buffer, 512, 1, inptr);
        }




        if(buffer[0] == 0xff && buffer[1] == 0xd8 && buffer[2] == 0xff &&
        (buffer[3] == 0xe0 || buffer[3] == 0xe1 || buffer[3] == 0xe2 || buffer[3] == 0xe3 ||
        buffer[3] == 0xe4 || buffer[3] == 0xe5 || buffer[3] == 0xe6 || buffer[3] == 0xe7 ||
        buffer[3] == 0xe8 || buffer[3] == 0xe9 || buffer[3] == 0xea || buffer[3] == 0xeb ||
        buffer[3] == 0xec || buffer[3] == 0xed || buffer[3] == 0xee || buffer[3] == 0xef ))
        {
            sprintf(name, "%i.jpg", num);
            FILE* outptr = fopen(name, "a");
            num++;

            printf(":512: "); //write
            fwrite(&buffer, 512, 1, outptr);
            writemode = 1;
        }
        fread(&buffer, 512, 1, inptr);
        //printf("."); //write
        fwrite(&buffer, 512, 1, outptr);

        while(buffer[0] != 0xff && buffer[1] != 0xd8 && buffer[2] != 0xff &&
        (buffer[3] != 0xe0 || buffer[3] != 0xe1 || buffer[3] != 0xe2 || buffer[3] != 0xe3 ||
        buffer[3] != 0xe4 || buffer[3] != 0xe5 || buffer[3] != 0xe6 || buffer[3] != 0xe7 ||
        buffer[3] != 0xe8 || buffer[3] != 0xe9 || buffer[3] != 0xea || buffer[3] != 0xeb ||
        buffer[3] != 0xec || buffer[3] != 0xed || buffer[3] != 0xee || buffer[3] != 0xef ))
        {
            fread(&buffer, 512, 1, inptr);
            //printf("."); //write
            fwrite(&buffer, 512, 1, outptr);
        }

        fclose(outptr);

    }

    fclose(inptr);

}