Converting a String To Number and Vice Versa in C++

http://stackoverflow.com/questions/5290089/how-to-convert-a-number-to-string-and-vice-versa-in-c

1. Do not use the itoa or itof functions because they are non-standard and therefore not portable.
2. Use string streams
   
   
   

   How to convert a string to a number in C++

   
   

   #include <sstream>
   #include <string>
   int main()
   {
      std::string inputString = "1234 12.3 44";
      std::istringstream istr(inputString);
      int i1, i2;
      float f;
      istr >> i1 >> f >> i2;
      //i1 is 1234, f is 12.3, i2 is 44  
   }

   
   

   How to convert a number to a string in C++

    #include <sstream>  //include this to use string streams
    #include <string> 
   
   int main()
   {    
       int number = 1234;
   
       std::ostringstream ostr; //output string stream
       ostr << number; //use the string stream just like cout,
       //except the stream prints not to stdout but to a string.
   
       std::string theNumberString = ostr.str(); //the str() function of the stream 
       //returns the string.
   
       //now  theNumberString is "1234"  
   }