標準庫標頭檔案 <ratio> (C++11)
來自 cppreference.com
此標頭檔案是 編譯時有理算術 庫的一部分。
類 | ||
| (C++11) |
表示精確有理分數 (類模板) | |
算術 | ||
| (C++11) |
在編譯時新增兩個 ratio 物件(別名模板) | |
| (C++11) |
在編譯時減去兩個 ratio 物件(別名模板) | |
| (C++11) |
在編譯時乘以兩個 ratio 物件(別名模板) | |
| (C++11) |
在編譯時除以兩個 ratio 物件(別名模板) | |
比較 | ||
| (C++11) |
在編譯時比較兩個 ratio 物件是否相等(類模板) | |
| (C++11) |
在編譯時比較兩個 ratio 物件是否不相等(類模板) | |
| (C++11) |
在編譯時比較兩個 ratio 物件是否“小於”(類模板) | |
| (C++11) |
在編譯時比較兩個 ratio 物件是否“小於或等於”(類模板) | |
| (C++11) |
在編譯時比較兩個 ratio 物件是否“大於”(類模板) | |
| (C++11) |
在編譯時比較兩個 ratio 物件是否“大於或等於”(類模板) | |
類型別名 | |
quecto (C++26) |
std::ratio<1, 1000000000000000000000000000000>，如果 std::intmax_t 能表示分母 |
ronto (C++26) |
std::ratio<1, 1000000000000000000000000000>，如果 std::intmax_t 能表示分母 |
yocto
|
std::ratio<1, 1000000000000000000000000>，如果 std::intmax_t 能表示分母 |
zepto
|
std::ratio<1, 1000000000000000000000>，如果 std::intmax_t 能表示分母 |
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>，如果 std::intmax_t 能表示分子 |
yotta
|
std::ratio<1000000000000000000000000, 1>，如果 std::intmax_t 能表示分子 |
ronna (C++26) |
std::ratio<1000000000000000000000000000, 1>，如果 std::intmax_t 能表示分子 |
quetta (C++26) |
std::ratio<1000000000000000000000000000000, 1>，如果 std::intmax_t 能表示分子 |
[編輯] 概要
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, 1000000000000000000000000000000> quecto; typedef ratio<1, 1000000000000000000000000000> ronto; 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; typedef ratio< 1000000000000000000000000000, 1> ronna; typedef ratio<1000000000000000000000000000000, 1> quetta; }
