This header is part of the compile-time rational arithmetic library.
| Classes | |
| (C++11) | represents exact rational fraction (class template) | 
| Arithmetic | |
| (C++11) | adds two ratioobjects at compile-time(alias template) | 
| (C++11) | subtracts two ratioobjects at compile-time(alias template) | 
| (C++11) | multiplies two ratioobjects at compile-time(alias template) | 
| (C++11) | divides two ratioobjects at compile-time(alias template) | 
| Comparison | |
| (C++11) | compares two ratioobjects for equality at compile-time(class template) | 
| (C++11) | compares two ratioobjects for inequality at compile-time(class template) | 
| (C++11) | compares two ratioobjects for less than at compile-time(class template) | 
| (C++11) | compares two ratioobjects for less than or equal to at compile-time(class template) | 
| (C++11) | compares two ratioobjects for greater than at compile-time(class template) | 
| (C++11) | compares two ratioobjects for greater than or equal to at compile-time(class template) | 
| Constants | |
| yocto | std::ratio<1, 1000000000000000000000000>, ifstd::intmax_tcan represent the denominator | 
| zepto | std::ratio<1, 1000000000000000000000>, ifstd::intmax_tcan represent the denominator | 
| atto | std::ratio<1, 1000000000000000000> | 
| femto | std::ratio<1, 1000000000000000> | 
| pico | std::ratio<1, 1000000000000> | 
| nano | std::ratio<1, 1000000000> | 
| micro | std::ratio<1, 1000000> | 
| milli | std::ratio<1, 1000> | 
| centi | std::ratio<1, 100> | 
| deci | std::ratio<1, 10> | 
| deca | std::ratio<10, 1> | 
| hecto | std::ratio<100, 1> | 
| kilo | std::ratio<1000, 1> | 
| mega | std::ratio<1000000, 1> | 
| giga | std::ratio<1000000000, 1> | 
| tera | std::ratio<1000000000000, 1> | 
| peta | std::ratio<1000000000000000, 1> | 
| exa | std::ratio<1000000000000000000, 1> | 
| zetta | std::ratio<1000000000000000000000, 1>, ifstd::intmax_tcan represent the numerator | 
| yotta | std::ratio<1000000000000000000000000, 1>, ifstd::intmax_tcan represent the numerator | 
namespace std {
 
    // class template ratio
    template <intmax_t N, intmax_t D = 1>
    class ratio {
    public:
        typedef ratio<num, den> type;
        static constexpr intmax_t num;
        static constexpr intmax_t den;
    };
 
 
    // ratio arithmetic            
    template <class R1, class   R2> using   ratio_add      = /*ratio*/;
    template <class R1, class   R2> using   ratio_subtract = /*ratio*/;
    template <class R1, class   R2> using   ratio_multiply = /*ratio*/;
    template <class R1, class   R2> using   ratio_divide   = /*ratio*/;
 
    // ratio comparison            
    template <class R1, class R2> struct ratio_equal;           
    template <class R1, class R2> struct ratio_not_equal;           
    template <class R1, class R2> struct ratio_less;      
    template <class R1, class R2> struct ratio_less_equal;          
    template <class R1, class R2> struct ratio_greater;         
    template <class R1, class R2> struct ratio_greater_equal;  
 
    // convenience SI typedefs         
    typedef ratio<1, 1000000000000000000000000> yocto;
    typedef ratio<1,    1000000000000000000000> zepto;
    typedef ratio<1,       1000000000000000000> atto;   
    typedef ratio<1,          1000000000000000> femto;  
    typedef ratio<1,             1000000000000> pico;   
    typedef ratio<1,                1000000000> nano;   
    typedef ratio<1,                   1000000> micro;  
    typedef ratio<1,                      1000> milli;  
    typedef ratio<1,                       100> centi;  
    typedef ratio<1,                        10> deci;   
    typedef ratio<                       10, 1> deca;   
    typedef ratio<                      100, 1> hecto;  
    typedef ratio<                     1000, 1> kilo;   
    typedef ratio<                  1000000, 1> mega;   
    typedef ratio<               1000000000, 1> giga;   
    typedef ratio<            1000000000000, 1> tera;   
    typedef ratio<         1000000000000000, 1> peta;   
    typedef ratio<      1000000000000000000, 1> exa;    
    typedef ratio<   1000000000000000000000, 1> zetta;
    typedef ratio<1000000000000000000000000, 1> yotta;
 
}
    © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
    https://en.cppreference.com/w/cpp/header/ratio