Hi, I'm having an issue with boost::format, in that I can't get it to format a value as hexadecimal if that value is of float type. For example, the little test program below prints: "As int: 0018, 0x0012, as float: 0018, 0x0018" This is as intended, I suppose, since floats can't printed in hex form anyhow. But is there anyway I can get the 'x' format type attribute to interpret the value as integer? Simply casting it to int is not an option, because the way my float value is interpreted should depend only on the format string. I added a hack to my application that fixes it for now, but that doesn't seem very correct: boost::format (..) fmt; double v = ..; if (fmod (v, 1.0) == 0.0) fmt % (int) v; else fmt % v; Cheers! Rob #include <iostream> #include <iomanip> #include <boost/format.hpp> using namespace std; int main() { cout << "As int: " << boost::format ("%1$04d, 0x%1$04x") % 18 << ", as float: " << boost::format ("%1$04d, 0x%1$04x") % (double) 18 << endl; }