lexical_cast组件

//强制类型转换
#include "stdafx.h"
#include <iostream>
#include <string>
#include <boost/lexical_cast.hpp>

using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
    string str_int="520";  
    string str_double="520.2314";
    const double d = 124.45;
    try
    {
        cout << boost::lexical_cast<int>(str_int) << endl;
        cout << boost::lexical_cast<double>(str_double) << endl;//默认精度为6
        cout << boost::lexical_cast<string>(d) << endl;
    }
    catch(boost::bad_lexical_cast& e)
    {
        cerr<<"Bad cast:"<<e.what()<<endl;
    }
    return 0;
}