Converting Double to String in C++

Question

I am having some issues trying to convert a double to C++ string. Here is my code

std::string doubleToString(double val)
{
    std::ostringstream out;
    ou         


        

Answer 1

You can also set the minimum width and fill char with STL IO manipulators, like:

out.width( 9 );
out.fill( ' ' );

Answer 2

#include <iomanip>

std::string doubleToString(double val)
{
   std::ostringstream out;
   out << std::fixed << val;
   return out.str();
}

Answer 3

#include <iomanip>
using namespace std;
// ...
out << fixed << val;
// ...

You might also consider using setprecision to set the number of decimal digits:

out << fixed << setprecision(2) << val;