Re: [Boost-users] getting started with Boost::Units

9 Jan 2009


      On Jan 9, 2009, at 1:16 PM, Matthias Schabel wrote:
...
...
Thanks!
Why does the the following simple code output "605 mi h^-1" instead  
of "605 mi/h"? Why is the "^-1" at the end?
#include <iostream>
#include 
#include 
#include 
using namespace boost::units;
using namespace std;
typedef us::mile_base_unit::unit_type mile_unit;
typedef metric::hour_base_unit::unit_type hour_unit;
typedef divide_typeof_helper::type  
miles_per_hour;
int main() {
quantity mph = 605.0 * miles_per_hour();
cout << mph << endl;
return 0;
}
The output code does not give special status to exponents of -1, but  
just treats them consistently. If you want specialized output, see  
examples/composite_output.cpp for an example.
Why is the exponent -1 in this example? I could understand if it was  
zero, but I don't think -1 makes sense.

---
Mark Volkmann