Справочное руководство по C++
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Страустрап Бьярн
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}

derived::derived

{

 cout ‹‹ "\tderived 1: this=" ‹‹ long(this) ‹‹ "\n";

 if (this == 0) this = (derived*)43;

 cout ‹‹ "\tderived 2: this=" ‹‹ long(this) ‹‹ "\n";

}

main

{

 cout ‹‹ "base b;\n";

 base b;

 cout ‹‹ "new base;\n";

 new base;

 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",");

}