how to convert a float number(1.00) to std::string C++

Question

Possible Duplicate:
Convert double to string C++?

however, thanks everyone, I have a float number:1.000, how to convert it to a std::string ,like "1.000".

Answer 1

std::stringstream stream;
float f = 1.000f;
stream << f;
std::string str;
stream >> str;

Answer 2

You can either use stringstream:

float val = 1.000f;
stringstream ss;
ss << val;
string stringVal = ss.str();

or use boost::lexical_cast<>() (which also uses stringstream underneath)

#include <boost/lexical_cast.hpp>
float val = 1.000f;
string stringVal = boost::lexical_cast<string>( val );