Compile-time rational arithmetic

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C++
 
Numerics的图书馆
常见的数学函数
浮点环境
复数
数字阵列
伪随机数生成
编译时合理的算法 （C++11）
通用的数值运算
Original:
Generic numeric operations
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iota（C++11）
accumulate
inner_product
adjacent_difference
partial_sum
 
编译时间合理的算法
ratio（C++11）
算术
Original:
Arithmetic
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ratio_add（C++11）
ratio_subtract（C++11）
ratio_multiply（C++11）
ratio_divide（C++11）
比较
Original:
Comparison
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ratio_equal（C++11）
ratio_not_equal（C++11）
ratio_less（C++11）
ratio_less_equal（C++11）
ratio_greater（C++11）
ratio_greater_equal（C++11）
 
的类模板std::ratio和相关模板提供了编译时合理的算法支持。此模板的每个实例完全代表任何合理数量有限.
Original:
The class template std::ratio and associated templates provide compile-time rational arithmetic support. Each instantiation of this template exactly represents any finite rational number.
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[编辑] 编译时的分数

Defined in header <ratio>
代表确切的合理的部分
Original:
represents exact rational fraction
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（类模板）
由标准库提供了几个方便的typedef对应的SI比例的
Original:
Several convenience typedefs that correspond to the SI ratios are provided by the standard library:
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Defined in header <ratio>
类型
Original:
Type
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 Definition
yocto
std::ratio<1, 1000000000000000000000000>，如果std::intmax_t可以表示分母
Original:
std::ratio<1, 1000000000000000000000000>, if std::intmax_t can represent the denominator
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zepto
std::ratio<1, 1000000000000000000000>，如果std::intmax_t可以表示分母
Original:
std::ratio<1, 1000000000000000000000>, if std::intmax_t can represent the denominator
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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可以代表的分子
Original:
std::ratio<1000000000000000000000, 1>, if std::intmax_t can represent the numerator
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yotta
std::ratio<1000000000000000000000000, 1>，如果std::intmax_t可以代表的分子
Original:
std::ratio<1000000000000000000000000, 1>, if std::intmax_t can represent the numerator
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[编辑] 编译时合理的算法

几类模板，执行算术运算ratio对象在编译时提供.
Original:
Several class templates, that perform arithmetic operations on ratio objects at compile-time are provided.
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Defined in header <ratio>
（C++11）
增加了两个ratio对象在编译时
Original:
adds two ratio objects at compile-time
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（类模板） [edit]
（C++11）
在编译时减去两个ratio对象
Original:
subtracts two ratio objects at compile-time
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（类模板） [edit]
（C++11）
将两个ratio对象在编译时
Original:
multiplies two ratio objects at compile-time
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（类模板） [edit]
（C++11）
将两个ratio对象在编译时
Original:
divides two ratio objects at compile-time
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（类模板） [edit]

[编辑] 编译时的理性的比较

ratio对象在编译时执行比较操作的几个类模板，提供.
Original:
Several class templates, that perform comparison operations on ratio objects at compile-time are provided.
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Defined in header <ratio>
（C++11）
比较两个ratio对象，在编译时的平等
Original:
compares two ratio objects for equality at compile-time
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（类模板） [edit]
（C++11）
比较两个ratio不平等的对象，在编译时间
Original:
compares two ratio objects for inequality at compile-time
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（类模板） [edit]
（C++11）
比较两个ratio对象为“小于”在编译时
Original:
compares two ratio objects for less than at compile-time
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（类模板） [edit]
（C++11）
 compares two ratio objects for less than or equal to at compile-time
（类模板） [edit]
（C++11）
比较两个ratio对象为“大于”在编译时
Original:
compares two ratio objects for greater than at compile-time
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（类模板） [edit]
（C++11）
比较两个ratio对象为“大于或等于”在编译时
Original:
compares two ratio objects for greater than or equal to at compile-time
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（类模板） [edit]
来自“http://zh.cppreference.com/mwiki/index.php?title=cpp/numeric/ratio&oldid=27044”