/c/ – Pufferüberlauf

#include <stdio.h>

const char *d =
    "9 7 2d\n"
    "9 6 4d\n"
    "9 5 6d\n"
    "9 5 3d 2d\n"
    "9 5 3d\n"
    "9 5 3d\n"
    "7 6d 3d\n"
    "4 9d4d\n"
    "2 4d8 3d\n"
    " 3d9  3d\n"
    "3d9 2 3d\n"
    "3d9 2 3d\n"
    "3d9 2 3d\n" "3d9 5d\n" "3d8 3d 3d\n" " 9d4d2 3d\n" "3 9d5 3d\n";

int main(int argc, char **argv)
{
    const char *c = d;
    unsigned int i = 1;
    unsigned int j;
    for (; *c > 0; ++c) {
	if (*c > 47 && *c < 58) {
	    i = *c - 48;
	} else {
	    for (j = 0; i > j; ++j) {
		putchar(*c);

	    }
	    i = 1;
	}
    }
    return 0;
}

                dd
               dddd
              dddddd
              ddd dd
              ddd
              ddd
       dddddd ddd
    ddddddddddddd
  dddd        ddd
 ddd          ddd
ddd           ddd
ddd           ddd
ddd           ddd
ddd         ddddd
ddd        ddd ddd
 ddddddddddddd  ddd
   ddddddddd     ddd

format	ELF executable 3
bst	db 6Bh,0Ah
entry	$
mov	eax,4
mov	ebx,1
mov	ecx,bst
mov	edx,2
int	0x80
mov	eax,1
xor	ebx,ebx
int	0x80

#include <unistd.h>

const unsigned char k[] = { 192, 204, 216, 240, 216, 204, 198, 0 };

int main(int argc, char **argv)
{
    unsigned int i, j;
    char c;
    char o[8 * 8 + 8 + 8] = { 0 };
    char *p;
    p = o;
    for (i = 0; i < sizeof(k) / sizeof(k[0]); ++i) {
	c = k[i];
	for (j = 0x80; j > 0; j = j >> 1, ++p) {
	    (c & j) ? (*p = '*') : (*p = ' ');
	}
	*(++p) = 10;
	*(++p) = 13;
    }
    return write(1, &o, 8 * 8 + 8 + 8);
}