Re: Aufgaben und Übungen,

#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 (\&amp;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]) \&amp;\&amp; (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, above of= 1, right of=1] {2};n");
printf("\node (3) [state, thick, above of= 2, left of=0] {3};nn");

printf("%Verbindungenn");
printf("\path[thick,->]n");


char *leftright [] = {"left", "right"};
char *abovebelow [] = {"above", "below"};

for (i = 0;  i < 4;  i++) {
        j = 0;
        fprintf(stderr, "%in", z [i][0]);
        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=%i, bend %s,%s] node {%i/%i} (%i)n", i, (i+1)*10+z[j][j]*5, leftright [(i>z[i][j])\&amp;\&amp;(z[i][j] != 3)], abovebelow [(i<=z[i][j])\&amp;\&amp;(z[i][j] != 3)], 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=%i, bend %s,%s] node {%i/%i} (%i)n", i, (i+1)*25+z[j][j]*8, leftright [(i<=z[i][j]) \&amp;\&amp;(z[i][j] != 3)], abovebelow [(i>z[i][j])\&amp;\&amp;(z[i][j] != 3)], j, rand () % 4, z[i][j]);
}
printf(";n");
printf("\end{tikzpicture}n");
printf("\end{center}n");
printf("\end{document}n");


return 0;
}