I/O stream related
//a line in file: A B C D
bsl::getline(istr, line);
bsl::stringstream lineStream;
lineStream << line;
lineStream >> c.tkr() >> c.shares >> c.dividend() >> c.numDivs();
#include <bsl_fstream.h>
bsl::ofstream outf(filename);
if (!outf.is_open())