69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
// ----------------------------------------------------------------------------
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// sample_new_features.cpp : demonstrate features added to printf's syntax
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// ----------------------------------------------------------------------------
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// Copyright Samuel Krempp 2003. Use, modification, and distribution are
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// subject to the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org/libs/format for library home page
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// ----------------------------------------------------------------------------
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#include <iostream>
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#include <iomanip>
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#include "boost/format.hpp"
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int main(){
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using namespace std;
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using boost::format;
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using boost::io::group;
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// ------------------------------------------------------------------------
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// Simple style of reordering :
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cout << format("%1% %2% %3% %2% %1% \n") % "o" % "oo" % "O";
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// prints "o oo O oo o \n"
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// ------------------------------------------------------------------------
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// Centered alignment : flag '='
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cout << format("_%|=6|_") % 1 << endl;
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// prints "_ 1 _" : 3 spaces are padded before, and 2 after.
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// ------------------------------------------------------------------------
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// Tabulations : "%|Nt|" => tabulation of N spaces.
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// "%|NTf|" => tabulation of N times the character <f>.
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// are useful when printing lines with several fields whose width can vary a lot
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// but we'd like to print some fields at the same place when possible :
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vector<string> names(1, "Marc-François Michel"),
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surname(1,"Durand"),
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tel(1, "+33 (0) 123 456 789");
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names.push_back("Jean");
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surname.push_back("de Lattre de Tassigny");
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tel.push_back("+33 (0) 987 654 321");
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for(unsigned int i=0; i<names.size(); ++i)
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cout << format("%1%, %2%, %|40t|%3%\n") % names[i] % surname[i] % tel[i];
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/* prints :
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Marc-François Michel, Durand, +33 (0) 123 456 789
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Jean, de Lattre de Tassigny, +33 (0) 987 654 321
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the same using width on each field lead to unnecessary too long lines,
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while 'Tabulations' insure a lower bound on the *sum* of widths,
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and that's often what we really want.
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*/
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cerr << "\n\nEverything went OK, exiting. \n";
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return 0;
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}
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