除非您担心效果，请使用字符串流：

Unless you're worried about performance, use string streams:

std::ostringstream ss;
ss << myFloat;
std::string s(ss.str());

如果您对Boost， lexical_cast<> 是一个方便的选择：

If you're okay with Boost, lexical_cast<> is a convenient alternative:

std::string s = boost::lexical_cast<std::string>(myFloat);

FastFormat 或简单的C风格函数。

Efficient alternatives are e.g. FastFormat or simply the C-style functions.