How to set boost::lexical_cast format?

Question

C++ / C#

float temp = 22.2f;

string s = boost::lexical_cast<string>(temp);

There are a lot of decimal places in a string, how can I convert it to the %.2f format, so that there are only 2 decimal places?

Answer 1

boost::format is here to help. lexical_cast is not designed for this.

std::string str = boost::str(boost::format("%.2f") % temp);