int main( )
{
// Use Boost library to make a random number generator.
boost::mt19937 randomNumbergenerator( time( 0 ) );
boost::random::uniform_real_distribution< > uniformDistribution( 0.0, 10.0 );
boost::variate_generator< boost::mt19937&, boost::random::uniform_real_distribution < > >
generateRandomNumbers( randomNumbergenerator, uniformDistribution );
// Generate random altitude value between 0 and 10 km.
const double altitudeKilometers = generateRandomNumbers( );
// Use the Tudat Core library to convert km to m.
const double altitudeMeters = tudat::unit_conversions::convertKilometersToMeters(
altitudeKilometers );
// Use the Eigen library to create position vectors.
Eigen::Vector3d positionOfBodySubjectToAcceleration;
positionOfBodySubjectToAcceleration << 1737.1e3 + altitudeMeters, 0.0, 0.0;
const Eigen::Vector3d positionOfBodyExertingAcceleration = Eigen::Vector3d::Zero( );
// Use the Tudat library to compute the acceleration vector.
const Eigen::Vector3d gravitationalAcceleration =
tudat::gravitation::computeGravitationalAcceleration(
positionOfBodySubjectToAcceleration, 4.9e12,
positionOfBodyExertingAcceleration );
// Print the altitude and norm of the acceleration vector.
std::cout << "Hello world!" << std::endl;
std::cout << "I am floating " << altitudeKilometers << " km above the Moon's surface." <<
std::endl;
std::cout << "The gravitational acceleration here is " <<
gravitationalAcceleration.norm() << " m/s^2." << std::endl;
return 0;
}
bool getRandomRtspSource(std::map<std::string, std::string>& randRtspScource)
{
std::map<std::string, std::string> totalRtspSource;
if (!extractRtspSource(totalRtspSource)) return false;
int recordNumberEachTime = -1;
if (!extractRecordNumberEachTime(recordNumberEachTime)) return false;
int min = 0, max = totalRtspSource.size();
std::vector<int> randNumbers;
if (!generateRandomNumbers(recordNumberEachTime, min, max, randNumbers)) {
return false;
}
std::sort(randNumbers.begin(), randNumbers.end());
std::map<std::string, std::string>::iterator it = totalRtspSource.begin();
for (int i = 0; it != totalRtspSource.end(); it++, i++) {
std::size_t j = 0;
for (; j < randNumbers.size(); ++j) {
if (i == randNumbers[j]) break;
}
if (j != randNumbers.size()) {
randRtspScource.insert(*it);
}
}
return true;
}
double NormalGenerator::get() {
if(randLeft) {
randLeft = false;
return lastNumber;
} else {
return generateRandomNumbers();
}
}
void main()
{
int i;
int value;
int position;
setHashMatrixNull();
generateRandomNumbers();
insertAll();
printHashMatrix();
printf("Enter the desired value or -1 to exit\n");
while( value!= -1 )
{
scanf("%d", &value);
if(value != -1)
{
position = findValue(value);
if(position > -1)
{
printf("value stored on position %d \n", position);
}
}
}
}
int main(int argc, char **argv)
{
long long numRands = 0;
long long numRandsPerNode = 0;
long long totNums = 0;
long long count;
char hostname[MAXHOSTNAMELEN];
double timeStart = 0;
double timeElapsed = 0;
MPI_Status status;
int i;
int nproc;
int remainder;
int me;
int who;
const int JOB_COMPLETED = 1;
if (argc < 2) {
fprintf(stderr, "Usage: %s <n>\n" ,argv[0]);
exit(1);
}
sscanf(argv[1],"%lld",&numRands); /* lld for long long int */
/* Start up MPI */
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &nproc);
MPI_Comm_rank(MPI_COMM_WORLD, &me);
gethostname(hostname, MAXHOSTNAMELEN);
printf("Hello! I am %d of %d running on %s.\n", me, nproc, hostname);
numRandsPerNode = numRands/nproc;
remainder = numRands % nproc;
/* divide remainder numbers into remainder processes */
if (me == nproc -1) {
numRandsPerNode += remainder;
}
if (me == 0) {
timeStart = MPI_Wtime(); /* and we are off! */
}
generateRandomNumbers(me, numRandsPerNode);
#ifdef DEBUG
printf("Process %d generated %lld random numbers\n", me, numRandsPerNode);
#endif
if (me == 0) {
printf("Process %d generated %lld random numbers\n", me, numRandsPerNode);
/* Wait for acknowledgemnt from process 1 ..nproc-1 */
for (i=1; i<nproc; i++) {
MPI_Recv(&count, 1, MPI_LONG_LONG_INT, MPI_ANY_SOURCE, JOB_COMPLETED, MPI_COMM_WORLD, &status);
who = status.MPI_SOURCE;
totNums += count; //Added to the results so far
printf("Received message from process %d (generated %lld numbers)\n", who, count);
}
} else {
/* Send acknowledgemnt to process 0 of job completed */
MPI_Send(&numRandsPerNode, 1, MPI_LONG_LONG_INT, 0, JOB_COMPLETED, MPI_COMM_WORLD);
}
if (me == 0) {
timeElapsed = MPI_Wtime() - timeStart;
printf("Elapsed time: %lf seconds\n",timeElapsed);
fflush(stdout);
}
MPI_Finalize();
exit(0);
}
