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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /stdlib/testrand.c
downloadglibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.tar.gz
initial import
Diffstat (limited to 'stdlib/testrand.c')
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1 files changed, 51 insertions, 0 deletions
diff --git a/stdlib/testrand.c b/stdlib/testrand.c
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+/* Copyright (C) 1992 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+int
+DEFUN_VOID(main)
+{
+ int i1, i2;
+ int j1, j2;
+
+ /* The C standard says that "If rand is called before any calls to
+ srand have been made, the same sequence shall be generated as
+ when srand is first called with a seed value of 1." */
+ i1 = rand();
+ i2 = rand();
+ srand (1);
+ j1 = rand();
+ j2 = rand();
+ if (j1 == i1 && j2 == i2)
+ {
+ puts ("Test succeeded.");
+ return 0;
+ }
+ else
+ {
+ if (j1 != i1)
+ printf ("%d != %d\n", j1, i1);
+ if (j2 != i2)
+ printf ("%d != %d\n", j2, i2);
+ puts ("Test FAILED!");
+ return 1;
+ }
+}