This a fast floating point to string conversion function. Avoids the use of unsafe sprintf function. Works with float and double types. Correctly manages +inf, -inf, nnan (not a number).-This is a fast floating point to string conversion function. Av

将浮点型数据转换为字符型数据的函数，在编程需要此功能时可方便调用此函数。-Stresses as a function of floating-point data conversion character data when programming can easily call this function.