std::isinf

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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
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Generic numeric operations
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iota（C++11）
accumulate
inner_product
adjacent_difference
partial_sum
 
常见的数学函数
功能
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Functions
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基本操作
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Basic operations
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remainder（C++11）
remquo（C++11）
fma（C++11）
fmax（C++11）
fmin（C++11）
fdim（C++11）
nan
nanf
nanl		（C++11）
（C++11）
（C++11）
指数函数
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Exponential functions
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exp
exp2（C++11）
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log
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Nearest integer floating point operations
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Classification/Comparison
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fpclassify（C++11）
isfinite（C++11）
isinf（C++11）
isnan（C++11）
isnormal（C++11）
signbit（C++11）
isgreater（C++11）
isgreaterequal（C++11）
isless（C++11）
islessequal（C++11）
islessgreater（C++11）
isunordered（C++11）
宏常量
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Macro constants
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HUGE_VALF
HUGE_VAL
HUGE_VALL		（C++11）

（C++11）
INFINITY（C++11）
NAN（C++11）
math_errhandling
MATH_ERRNO
MATH_ERREXCEPT		（C++11）
FP_NORMAL
FP_SUBNORMAL
FP_ZERO
FP_INFINITE
FP_NAN		（C++11）
（C++11）
（C++11）
（C++11）
（C++11）
 
Defined in header <cmath>
bool isinf( float arg );
 （C++11 起）
bool isinf( double arg );
 （C++11 起）
bool isinf( long double arg );
 （C++11 起）
确定是否在给定的浮点数arg是正的或负的无穷.
Original:
Determines if the given floating point number arg is positive or negative infinity.
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[编辑] 参数

arg -
浮点值
Original:
floating point value
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[编辑] 返回值

true如果arg是无限的，false其他方式
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true if arg is infinite, false otherwise
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[编辑] 另请参阅

（C++11）
分类浮点值
Original:
categorizes the given floating point value
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（函数） [edit]
（C++11）
如果给定数量的检查具有有限的价值
Original:
checks if the given number has finite value
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（函数） [edit]
（C++11）
检查，如果给定的数字为NaN
Original:
checks if the given number is NaN
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（函数） [edit]
（C++11）
检查如果给定的数字是正常的
Original:
checks if the given number is normal
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（函数） [edit]
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