Boost_lexical_cast

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#include < boost/lexical_cast.hpp>
using namespace boost;

  1. conversion between number and string: replace the atoi, itoa, and etc

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    cout<< lexical_cast< string>(i)<< endl;
    cout<< lexical_cast< double>(s)<< endl;

  2. mixed types: for type generalization

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    #include < boost/fusion/adapted/boost_tuple.hpp>
    boost::tuple<char, int, char, int> decim('-', 10, 'e', 5);
    assert(stringize(decim) == "-10e5");