The conversion of string and other types in C + +.

SSCANF, sprintf can also be used, but not recommended, in fact C + + implementation of string and other data types of conversion is easy to complete, see the following code:

[CPP]  View plain copy #include  <iostream>   using std::cout;   using std:: endl;   #include  <string>   using std::string;      # include <sstream>   using std::stringstream;   Using std::ostringstream ;      template <class t>     string tostring (const  t& s);       int main ()     {        string value =  "";        int inum =  0;       double dnum = 0.0;        value =  "123";       stringstream strStream;       strStream << value;        strstream  >> inum;       strstream.clear ();  //  must be  clear , otherwise the next call is unsuccessful           value =  "123.45";        strStream << value;       strStream >>  dnum;          cout << inum <<  "   " << dnum <<endl;               string test =  "";        test =  ToString (dnum);       cout << test << endl;           return 0;  }     //other types converted to String type    template <class t>     string tostring (const T&  s)  {       ostringstream os;       os  << s;       return os.str ();  }  

Note: If the data in the text is a scientific enumeration, for example, the text is: 1.44e-07 can still normal conversion.

Reference:

Istringstream, Ostringstream, stringstream implementation data type into string