Boost project provides a conversion class lexical_cast that does the same thing for numeric strings of base 10. - C++ boost

C++ examples for boost:Number

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Description

Boost project provides a conversion class lexical_cast that does the same thing for numeric strings of base 10. 

#include <iostream>
#include <string>
#include <boost/lexical_cast.hpp>

using namespace std;

int main() {
   string str1 = "750";
   string str2 = "2.71";
   string str3 = "0x7FFF";
   try {
      cout << boost::lexical_cast<int>(str1) << endl;

      cout << boost::lexical_cast<double>(str2) << endl;
      cout << boost::lexical_cast<int>(str3) << endl;
   }
   catch (boost::bad_lexical_cast& e) {
      cerr << "Bad cast: " << e.what() << endl;
   }
}

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