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

int main(int argc, char *argv[])
{
    //BITMAPFILEHEADER bf;



    typedef uint8_t BYTE;// defines a byte as 8 bits

    FILE *jpgread = fopen(argv[1],"r");
    FILE *jpgwrit = NULL;
    BYTE buffer[512];
    int filenumber = 0;
    bool newjpg = false;

    char imgname[8];

    if (argc != 2)
    {
        printf("usage error");
        return 1;
    }

    if (jpgread == NULL)
    {
        printf("usage error");
    }

    while (fread(buffer, 512,1,jpgread) == 1)
    {
        newjpg = false;
        if (buffer[0] == 0xff && buffer[1] == 0xd8 && buffer[2] == 0xff && (buffer[3] & 0xf0) == 0xe0)

        {
            newjpg = true;
        }
        if (newjpg == true)
        {
            sprintf(imgname, "%03i.jpg",filenumber);
            jpgwrit = fopen(imgname,"w");
            //fwrite(jpgwrit,512,1,jpgread);
            fwrite(jpgwrit,1,512,jpgread);
            filenumber++;
        }
        else
        {
            newjpg = false;
            continue;
        }

	}

    if (jpgwrit != NULL)
    {
        fclose(jpgread);
    }

}