/* -*-comment-start: "//";comment-end:""-*- * GNU Mes --- Maxwell Equations of Software * Copyright © 2017 Jan (janneke) Nieuwenhuizen * * This file is part of GNU Mes. * * GNU Mes is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or (at * your option) any later version. * * GNU Mes is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with GNU Mes. If not, see . */ #include #include #include int compare_int (void const *a, void const *b) { eputs ("compare: "); eputs (itoa (*(int *) a)); eputs (" "); eputs (itoa (*(int *) a - *(int *) b)); eputs ("\n"); return *(int *) a - *(int *) b; } int main () { int lst[6] = { 0, 5, 4, 3, 2, -1 }; qsort (lst, 6, sizeof (int), compare_int); for (int i = 0; i < 6; i++) { eputs (itoa (i)); eputs (":"); eputs (itoa (lst[i])); eputs ("\n"); } if (lst[0] != -1) return 1; if (lst[5] != 5) return 2; return 0; }