#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define EMPTY_Z -1
#define UNINIT_Z -2
int main (void) {
time_t t;
int i, j;
int z [4][2];
int flag;
srand ((unsigned)time (\&t));
for (i = 0; i < 4; i++) {
z [i][0] = i;
z [i][1] = i;
}
flag = 0;
while (!flag) {
for (i = 0; i < 4; i++) {
for (j = i + 1; j < 4; j++) {
if ((rand () % 32) > 16) {
t = z [j][0];
z [j][0] = z[i][0];
z [i][0] = t;
}
}
}
for (i = 0; i < 4; i++) {
for (j = i + 1; j < 4; j++) {
if ((rand () % 16) < 8) {
t = z [j][1];
z [j][1] = z[i][1];
z [i][1] = t;
}
}
}
flag = 1;
for (i = 0; i < 4; i++)
if ((z[i][0] == z[i][1]) \&\& (z[i][1] == i)) {
flag = 0;
}
}
printf("\documentclass{article}n");
printf("\usepackage[utf8]{inputenc}n");
printf("\usepackage{pgf, tikz}n");
printf("\usetikzlibrary{arrows , automata , positioning}n");
printf("\begin{document}nn");
printf("\begin{center}n");
printf("\begin{tikzpicture}[>=stealth',shorten >=1pt,auto,node distance=2.5cm]n");
printf("%Knotenn");
printf("\node (0) [state, thick] {0};n");
printf("\node (1) [state, thick, right of= 0] {1};n");
printf("\node (2) [state, thick, right of= 1] {2};n");
printf("\node (3) [state, thick, below of= 1] {3};nn");
printf("%Verbindungenn");
printf("\path[thick,->]n");
for (i = 0; i < 4; i++) {
j = 0;
fprintf(stderr, "%in", z [i][0]);
if (z [i][j] == i)
printf ("(%i) edge [loop above] node {%i/%i} (%i)n", i, j, rand () % 4, z[i][j]);
else
printf ("(%i) edge node {%i/%i} (%i)n", i, j, rand () % 4, z[i][j]);
j = 1;
if (z [i][j] == i)
printf ("(%i) edge [loop] node {%i/%i} (%i)n", i, j, rand () % 4, z[i][j]);
else
printf ("(%i) edge [bend angle=15, bend left,below] node {%i/%i} (%i)n", i, j, rand () % 4, z[i][j]);
}
printf(";n");
printf("\end{tikzpicture}n");
printf("\end{center}n");
printf("\end{document}n");
return 0;
}