Reverseit

gistfile1.c

#include <stdio.h>

void main()
{
	int i = 0;
	unsigned char d = 0;
	FILE *fp = fopen("Reverseit", "rb");
	FILE *ofp = fopen("reversed_1.jpg", "wb");
	while (i < 0x1e12)
	{
		fseek(fp, 0x1e11 - i, SEEK_SET);
		d = fgetc(fp);
		d = (d >> 4) | (d << 4);
		printf("%02x ", d);
		fputc(d, ofp);
		i++;
	}
	fclose(fp);
	fclose(ofp);
}