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MPI: Difference between revisions
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| Line 424: | Line 424: | ||
MPI_Finalize(); | MPI_Finalize(); | ||
return(0); | return(0); | ||
} | |||
}} | |||
</tab> | |||
<tab name="Boost (C++)"> | |||
{{File | |||
|name=phello.cpp | |||
|lang="cpp" | |||
|contents= | |||
#include <iostream> | |||
#include <string> | |||
#include <boost/mpi.hpp> | |||
using namespace std; | |||
using namespace boost; | |||
int main(int argc, char *argv[]) | |||
{ | |||
mpi::environment env(argc, argv); | |||
mpi::communicator world; | |||
int rank = world.rank(); | |||
int size = world.size(); | |||
string outmessage = "Hello, world! from process " + to_string(rank) + " of " + to_string(size); | |||
string inmessage; | |||
int sendto = (rank + 1) % size; | |||
int recvfrom = (rank + size - 1) % size; | |||
cout << outmessage << endl; | |||
world.send(sendto,0,outmessage); | |||
world.recv(recvfrom,0,inmessage); | |||
cout << "[P_" << rank << "] process " << recvfrom << " said: \"" << inmessage << "\"" << endl; | |||
return 0; | |||
} | } | ||
}} | }} | ||