?? outbuf1.hpp
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/* The following code example is taken from the book * "The C++ Standard Library - A Tutorial and Reference" * by Nicolai M. Josuttis, Addison-Wesley, 1999 * * (C) Copyright Nicolai M. Josuttis 1999. * Permission to copy, use, modify, sell and distribute this software * is granted provided this copyright notice appears in all copies. * This software is provided "as is" without express or implied * warranty, and with no claim as to its suitability for any purpose. */#include <streambuf>#include <locale>#include <cstdio>class outbuf : public std::streambuf{ protected: /* central output function * - print characters in uppercase mode */ virtual int_type overflow (int_type c) { if (c != EOF) { // convert lowercase to uppercase c = std::toupper(c,getloc()); // and write the character to the standard output if (putchar(c) == EOF) { return EOF; } } return c; }};
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