Code that can get out two images

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

int main (int argc, string argv[])
{
    if (argc != 2)
    {
        fprintf(stderr, "Usage: ./recover image");
        return 1;
    }

    char *readingfile = argv[1]; //name of file
    //char *outfile; do we need this here since this is going to be changing?
    FILE *memorycard = fopen (readingfile, "r"); //setting pointer for memorycard to the file we opened with the name given

    uint8_t buffer[4]; //buffer to hold first four values of the array! (for checking purposes, of course!), could this happen with char*?

     //starting off with the first four bytes of data
    printf("Location of bmp after moving 4 bytes: %li\n", ftell(memorycard));




    if (memorycard == NULL) //if any segmentation faults
    {
        fprintf(stderr, "Usage: ./recover image");
        return 2;
    }

    bool didnotfindjpg = true;
    int blocksofspace = 0;

    do //fread has size of each element to be read before number of elements
    {
        fread(buffer, 4, 1, memorycard);

        if (buffer[0] == 0xff && buffer[1] == 0xd8 && buffer[2] == 0xff && (buffer[3] & 0xf0) == 0xe0)
        {
            didnotfindjpg = false;
            fseek(memorycard, -4, SEEK_CUR); //go to the beginning of the block we are going to read
        }

        else
        {
            fseek(memorycard, -4, SEEK_CUR);
            fseek(memorycard, 512, SEEK_CUR);
             //sort of like magnifying glass to see what we are reading
            printf("First value of BMP: %i\t, Second Value: %i\t,  Third Value: %i\t, Fourth value: %i\n",buffer[0], buffer[1], buffer[2], buffer[3]);

        }


    } while (didnotfindjpg == true); //now we figured out where the file starts




    uint8_t bigbuffer[512];
    bool endofjpeg = false;

    while (endofjpeg == false) //will stop when we reach the end of the jpegfile
    {
        for (int g = 0; g < 5; g++)
        {
            int a = 10*g; //does this read within the parentheses coming next?
            printf("This is the ten's place of the number of pictures we are saving: %i",g);
            for (int x = 0 + a; x < 10 + a; x++)
            {
                char nameoffile[7];
                if (x < 10) //we need to use two digits for making file names greater than 10!
                {
                    sprintf(nameoffile,"00%i.jpg", x);
                }
                if (x >=10)
                {
                    sprintf(nameoffile, "0%i.jpg", x);
                }

                FILE *writehere = fopen (nameoffile, "w");
                bool startofnextfile = false;
                do
                {
                    int h = fread(bigbuffer, 1, 512, memorycard);
                    printf("%i\n", h);
                    if (h == 512)
                    {
                    fwrite(bigbuffer, 1,512, writehere);
                    }
                    else
                    {
                        fclose(writehere);
                        printf("HEY!");
                        return 0;
                    }
                    //free(bigbuffer);
                    //free(buffer);
                    fread(buffer, 4, 1, memorycard);

                    if  (buffer[0] == 0xff && buffer[1] == 0xd8 && buffer[2] == 0xff && (buffer[3] & 0xf0) == 0xe0) //while not start of JPEG
                    {
                        startofnextfile = true;
                        fclose(writehere); //do i close "writehere" or the file?
                        fseek(memorycard, -4, SEEK_CUR);

                    }
                    else
                    {
                        fseek(memorycard, -4, SEEK_CUR);

                    }
                }
                    while (startofnextfile == false);
            }
        }

    }


    return 0;
}