int main ( int argc, char * const argv[] )
{
printf( "Testing output and speed of Kuenning's Mersenne Twister class\n" );
printf( "\nTest of random integer generation:\n" );
unsigned long oneSeed = 4357UL;
mt_u32bit_t bigSeed[MT_STATE_SIZE] = { 0x123, 0x234, 0x345, 0x456 };
// NOTE: Kuenning's class lacks the usual seeding and generation functions
printf( "\nTest of random integer generation:\n" );
mt_prng mtrand1( bigSeed );
unsigned long i;
for( i = 0; i < 1000UL; ++i )
{
printf( "%10lu ", mtrand1.lrand() );
if( i % 5 == 4 ) printf("\n");
}
printf( "\nTest of random real number [0,1) generation:\n" );
for( i = 0; i < 1000UL; ++i )
{
printf( "%10.8f ", mtrand1.drand() );
if( i % 5 == 4 ) printf("\n");
}
printf( "\nTest of random real number [0,1] generation:\n" );
mt_prng mtrand2( oneSeed );
for( i = 0; i < 2000UL; ++i )
{
printf( "%10.8f ", mtrand2.drand() );
if( i % 5 == 4 ) printf("\n");
}
printf( "\nTest of time to generate one billion random integers:\n" );
mt_prng mtrand3( oneSeed );
unsigned long junk = 0;
clock_t start = clock();
for( i = 0; i < 1000000000UL; ++i )
{
junk ^= mtrand3.lrand();
}
clock_t stop = clock();
if( junk == 0 ) printf( "jinx\n" );
printf( "Time elapsed = " );
printf( "%8.3f", double( stop - start ) / CLOCKS_PER_SEC );
printf( " s\n" );
return 0;
}
int main(void)
{
printf( "Testing output and speed of MersenneTwister.h\n" );
printf( "\nTest of random integer generation:\n" );
MTRand mtrand1( 4357U );
for( int i = 0; i < 1000; ++i )
{
printf( "%10lu ", mtrand1.randInt() );
if( i % 5 == 4 ) printf("\n");
}
printf( "\nTest of random real number [0,1] generation:\n" );
MTRand mtrand2( 4357U );
for( int i = 0; i < 1000; ++i )
{
printf( "%10.8f ", mtrand2.rand() );
if( i % 5 == 4 ) printf("\n");
}
printf( "\nTest of random real number [0,1) generation:\n" );
MTRand mtrand3( 4357U );
for( int i = 0; i < 1000; ++i )
{
printf( "%10.8f ", mtrand3.randExc() );
if( i % 5 == 4 ) printf("\n");
}
printf( "\nTest of time to generate 300 million random integers:\n" );
MTRand mtrand4( 4357U );
unsigned long junk;
clock_t startClock = clock();
for( long i = 0; i < 3e+8; ++i )
{
junk = mtrand4.randInt();
}
clock_t stopClock = clock();
printf( "Time elapsed = " );
printf( "%8.3f", double( stopClock - startClock ) / CLOCKS_PER_SEC );
printf( " s\n" );
printf( "\nTests of functionality:\n" );
// Array save/load test
bool saveArrayFailure = false;
MTRand mtrand5;
unsigned long pass1[5], pass2[5];
MTRand::uint32 saveArray[ MTRand::SAVE ];
mtrand5.save( saveArray );
for( int i = 0; i < 5; ++i )
pass1[i] = mtrand5.randInt();
mtrand5.load( saveArray );
for( int i = 0; i < 5; ++i )
{
pass2[i] = mtrand5.randInt();
if( pass2[i] != pass1[i] )
saveArrayFailure = true;
}
if( saveArrayFailure )
printf( "Error - Failed array save/load test\n" );
else
printf( "Passed array save/load test\n" );
// Stream save/load test
bool saveStreamFailure = false;
std::ofstream dataOut( "state.data" );
if( dataOut )
{
dataOut << mtrand5; // comment out if compiler does not support
dataOut.close();
}
for( int i = 0; i < 5; ++i )
pass1[i] = mtrand5.randInt();
std::ifstream dataIn( "state.data" );
if( dataIn )
{
dataIn >> mtrand5; // comment out if compiler does not support
dataIn.close();
}
for( int i = 0; i < 5; ++i )
{
pass2[i] = mtrand5.randInt();
if( pass2[i] != pass1[i] )
saveStreamFailure = true;
}
if( saveStreamFailure )
printf( "Error - Failed stream save/load test\n" );
else
printf( "Passed stream save/load test\n" );
// Integer range test
MTRand mtrand6;
bool integerRangeFailure = false;
bool gotMax = false;
for( int i = 0; i < 10000; ++i )
{
int r = mtrand6.randInt(17);
if( r < 0 || r > 17 )
integerRangeFailure = true;
if( r == 17 )
gotMax = true;
}
if( !gotMax )
integerRangeFailure = true;
if( integerRangeFailure )
printf( "Error - Failed integer range test\n" );
else
printf( "Passed integer range test\n" );
// Float range test
MTRand mtrand7;
bool floatRangeFailure = false;
for( int i = 0; i < 10000; ++i )
{
float r = mtrand7.rand(0.3183);
if( r < 0.0 || r > 0.3183 )
floatRangeFailure = true;
}
if( floatRangeFailure )
printf( "Error - Failed float range test\n" );
else
printf( "Passed float range test\n" );
// Auto-seed uniqueness test
MTRand mtrand8a, mtrand8b, mtrand8c;
double r8a = mtrand8a();
double r8b = mtrand8b();
double r8c = mtrand8c();
if( r8a == r8b || r8a == r8c || r8b == r8c )
printf( "Error - Failed auto-seed uniqueness test\n" );
else
printf( "Passed auto-seed uniqueness test\n" );
return 0;
}
