lexical_cast组件

 1 //强制类型转换
 2 #include "stdafx.h"
 3 #include <iostream>
 4 #include <string>
 5 #include <boost/lexical_cast.hpp>
 6 
 7 using namespace std;
 8 
 9 int _tmain(int argc, _TCHAR* argv[])
10 {
11     string str_int="520";  
12     string str_double="520.2314";
13     const double d = 124.45;
14     try
15     {
16         cout << boost::lexical_cast<int>(str_int) << endl;
17         cout << boost::lexical_cast<double>(str_double) << endl;//默认精度为6
18         cout << boost::lexical_cast<string>(d) << endl;
19     }
20     catch(boost::bad_lexical_cast& e)
21     {
22         cerr<<"Bad cast:"<<e.what()<<endl;
23     }
24     return 0;
25 }