Re: no number->string conversion in stdc++?
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Shriramana Sharma wrote: > I learnt today to my dismay that there is in fact no number to string > conversion function in the standard C++ library? I can't do simple > natural things like: > > std :: string a ( 2 ) ; > std :: string b ( 2.5 ) ; These conversions are neither simple nor natural. Look at the printf() documentation, and note how much of it applies to formatting numeric values. Base, precision, field width, leading zeroes/spaces, exponential notation. And that's aside from locale issues (e.g. decimal separator), which aren't described there. > The three ways out of this problem I got to know: > > 1. stringstream from std, resulting in somewhat unweildy operations > 2. lexical_cast from boost, resulting in dependency on huge boost lib > 3. QString from Qt, resulting in depdency on huge Qt lib > > Of course stdc++ is also a huge lib, but thought I can expect stdc++ to > be there on more machines than boost or Qt. > > So shall I go with std::string and std::stringstream, std::string and > boost::lexical_cast or simply Qt's QString? QString seems most > appealing, but I would listen to your better judgment. If the std::ostream formatting operators are sufficient, then use std::ostringstream, otherwise write your own. Don't use substantial external libraries just for a few utility functions. -- Glynn Clements <glynn@xxxxxxxxxxxxxxxxxx> - To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html