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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*=============================================================================
**
** Source: test1.c
**
** Purpose: Test to ensure that srand provide random
** number to rand. Also make sure that rand result from a
** srand with seed 1 and no call to srand are the same.
**
** Dependencies: PAL_Initialize
** PAL_Terminate
** Fail
** srand()
**
**
**===========================================================================*/
#include <palsuite.h>
int __cdecl main(int argc, char **argv)
{
int RandNumber[10];
int TempRandNumber;
int i;
int SRAND_SEED;
int SRAND_REINIT = 1;
/*
* Initialize the PAL and return FAILURE if this fails
*/
if (PAL_Initialize(argc, argv))
{
return FAIL;
}
SRAND_SEED = time(NULL);
/* does not initialize srand and call rand. */
for (i=0; i<10; i++)
{
/* keep the value in a array */
RandNumber[i]=rand();
if (RandNumber[i] < 0 || RandNumber[i] > RAND_MAX)
{
Fail("1) ERROR: random generated an invalid value: %d", RandNumber[i]);
}
}
/* initialize random generator */
srand(SRAND_SEED);
/* choose 10 numbers with a different seed.
the numbers should be different than
those the previously generated one */
for(i = 0; i < 10; i++)
{
TempRandNumber=rand();
if (TempRandNumber < 0 || TempRandNumber > RAND_MAX)
{
Fail("2) ERROR: random generated an invalid value: %d", TempRandNumber);
}
}
/* renitialize the srand with 1 */
srand(SRAND_REINIT);
/* choose 10 numbers with seed 1,
the number should be the same as those we kept in the array. */
for( i = 0; i < 10;i++ )
{
/* pick the random number*/
TempRandNumber=rand();
/* test if it is the same number generated in the first sequences*/
if(RandNumber[i]!=TempRandNumber)
{
Fail ("ERROR: rand should return the same value when srand "
"is initialized with 1 or not initialized at all");
}
if (TempRandNumber < 0 || TempRandNumber > RAND_MAX)
{
Fail("3) ERROR: random generated an invalid value: %d", TempRandNumber);
}
}
PAL_Terminate();
return PASS;
}
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