Convert double to string C++? [duplicate]

Answer 1

You can't do it directly. There are a number of ways to do it:

1. Use a std::stringstream:

   std::ostringstream s;
   s << "(" << c1 << ", " << c2 << ")";
   storedCorrect[count] = s.str()
   

2. Use boost::lexical_cast:

   storedCorrect[count] = "(" + boost::lexical_cast(c1) + ", " + boost::lexical_cast(c2) + ")";
   

3. Use std::snprintf:

   char buffer[256];  // make sure this is big enough!!!
   snprintf(buffer, sizeof(buffer), "(%g, %g)", c1, c2);
   storedCorrect[count] = buffer;
   

There are a number of other ways, using various double-to-string conversion functions, but these are the main ways you'll see it done.