C++: what is the optimal way to convert a double to a string?

Question

What is the most optimal way to achieve the same as this?

void foo(double floatValue, char* stringResult)
{
    sprintf(stringResult, \"%f\", floatV         


        

Answer 1

If you use the Qt4 frame work you could go :

double d = 5.5;
QString num = QString::number(d);