1 #include <boost/lexical_cast.hpp> 
 2 #include <iostream> 
 3 int main() 
 4 { 
 5     using boost::lexical_cast; 
 6     int a = lexical_cast<int>("123"); 
 7     double b = lexical_cast<double>("123.12"); 
 8     std::cout<<a<<std::endl 
 9     std::cout<<b<<std::endl; 
10     return 0; 
11 }

 1 #include <boost/lexical_cast.hpp> 
 2 #include <string> 
 3 #include <iostream> 
 4 int main() 
 5 { 
 6     using std::string; 
 7     const double d = 123.12; 
 8     string s = boost::lexical_cast<string>(d); 
 9     std::cout<<s<<std::endl; 
10     return 0; 
11 }

 1 #include <boost/lexical_cast.hpp> 
 2 #include <iostream> 
 3 int main() 
 4 { 
 5     using std::cout; 
 6     using std::endl; 
 7     int i; 
 8     try 
 9     { 
10         i = boost::lexical_cast<int>("xyz"); 
11     } 
12     catch(boost::bad_lexical_cast& e) 
13     { 
14         cout<<e.what()<<endl; 
15         return 1; 
16     } 
17     cout<<i<<endl; 
18     return 0; 
19 }