[Boost-users] [mpi] open/write to file for simple output

Hi, I am fairly new to mpi (and boost mpi). I have an mpi program and I need to dump some intermediate and results to a simple text file. First, is there already any good (using boost.mpi or not) to open and write files (let's say from process 0) and write to them. Second, if not, I am already trying to make the code as transparent as possible: I guess the most primitive way to do this is to do something like ofstream ofs(); if(world.rank()==0) ofs.open("file"); ... if(world.rank()==0) ofs<std::ofstream optional_ofs(world.rank()==0, std::ofstream("file") ); ... if(optional_ofs) *optional_ofs<