Difference between revisions of "cpp/numeric/ratio/ratio add"
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Revision as of 17:12, 19 April 2012
Template:cpp/numeric/ratio/sidebar Template:ddcl list begin <tr class="t-dsc-header">
<td>Defined in header
</td>
<ratio>
<td></td> <td></td> </tr> <tr class="t-dcl ">
<td class="t-dcl-nopad">template< class R1, class R2 >
using ratio_add = /* unspecified */;
</td>
using ratio_add = /* unspecified */;
<td class="t-dcl-nopad"> </td> <td class="t-dcl-nopad"> </td> </tr> Template:ddcl list end
The template alias std::ratio_add denotes the result of adding two exact rational fractions represented by the Template:cpp instances R1 and R2. The result a Template:cpp instance std::ratio<Num, Denom> where Template:cpp and Template:cpp.
Member types
Template:tdcl list begin Template:tdcl list hitem Template:tdcl list item Template:tdcl list end
Member constants
| num [static] |
Template:cpp value of type Template:cpp equal to sign(Num) * sign(Denom) * abs(Num) / gcd(Num, Denom) (public static member constant) |
| den [static] |
Template:cpp value of type Template:cpp equal to abs(Denom) / gcd(Num, Denom) (public static member constant) |
Example
Run this code
#include <iostream> #include <ratio> int main() { typedef std::ratio<2, 3> two_third; typedef std::ratio<1, 6> one_sixth; typedef std::ratio_add<two_third, one_sixth> sum; std::cout << "2/3 + 1/6 = " << sum::num << '/' << sum::den << '\n'; }
Output:
2/3 + 1/6 = 5/6
