Справочное руководство по C++

 cout ‹‹ "derived d;\n";
 derived d;
 cout ‹‹ "new derived;\n";
 new derived;
 cout ‹‹ "new derived;\n";
 new derived;
 cout ‹‹ "at the end\n";
}

b8_3_3.cxx

#include ‹xstream.hxx›

extern void exit(int);

void error(char* s, char* s2)
{
 cerr ‹‹ s ‹‹ " " ‹‹ s2 ‹‹ "\n";
 exit(1);
}

main(int argc, char* argv[])
{
 if (argc != 3) error ("wrong number of arguments",");

 filebuf f1;
 if (f1.open(argv[1],input) == 0)
 error("cannot open input file",argv[1]);
 istream from(&f1);

 filebuf f2;
 if (f2.open(argv[2],output) == 0)
 error("cannot open input file",argv[2]);
 ostream to(&f2);

 char ch;
 while (from.get(ch)) to.put(ch);

 if (!from.eof || to.bad)
 error("something strange happened",");
}