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std::numeric_limits::min

提供: cppreference.com

 
 
ユーティリティライブラリ
支援を入力します (basic types, RTTI, type traits)
動的なメモリ管理
エラー処理
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可変個引数関数
日付と時刻
関数オブジェクト
initializer_list(C++11)
bitset
hash(C++11)
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
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Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
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Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
支援を入力します
基本的なタイプ
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Basic types
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基本的なタイプ
固定幅の整数型 (C++11)
数値の限界
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Numeric limits
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numeric_limits
Cの数値は、インターフェイスを制限します
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Runtime type information
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型の特徴
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Type traits
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Primary type categories
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is_void(C++11)
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Type properties
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Supported operations
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is_constructible
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is_move_constructible
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is_assignable
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is_copy_assignable
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is_move_assignable
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is_destructible
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(C++11)
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has_virtual_destructor(C++11)
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Relationships and property queries
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rank(C++11)
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add_cv
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(C++11)
make_signed(C++11)
make_unsigned(C++11)
型変換
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Type transformations
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aligned_storage(C++11)
aligned_union(C++11)
decay(C++11)
enable_if(C++11)
conditional(C++11)
common_type(C++11)
underlying_type(C++11)
result_of(C++11)
形質定数を入力します
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Type trait constants
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integral_constant(C++11)
 
 
static T min()
(C + + 11時まで)
static constexpr T min()
(C + + 11以来)
数値型Tで表現最小有限値を返します。非正規と小数点型をフローティングするための最小の正の正規化した値を返します。有界と非有界タイプのためunsigned型の場合にのみ意味、つまり負の値の無限集合を表す型は意味のある最小値を持っていない.
Original:
Returns the minimum finite value representable by the numeric type T. For floating point types with denormalization returns the minimum positive normalized value. Only meaningful for bounded types and for unbounded unsigned types, that is, types that represent an infinite set of negative values have no meaningful minimum.
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目次

[編集] 値を返します

T std::numeric_limits<T>::min()
/* non-specialized */ T();
bool false
char CHAR_MIN
signed char SCHAR_MIN
unsigned char 0
wchar_t WCHAR_MIN
char16_t 0
char32_t 0
short SHRT_MIN
unsigned short 0
int INT_MIN
unsigned int 0
long LONG_MIN
unsigned long 0
long long LLONG_MIN
unsigned long long 0
float FLT_MIN
double DBL_MIN
long double LDBL_MIN

[編集] 例外

noexcept specification:  
noexcept
  (C + + 11以来)

[編集]

typedefされた型で使用すると、整数と浮動小数点型の間の結果の符号の違いを示しています
Original:
Demonstrates the use with typedef types, and the difference in the sign of the result between integer and floating-point types
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#include <limits>
#include <cstddef>
#include <iostream>
int main()
{
    std::cout << "short: " << std::dec << std::numeric_limits<short>::min()
              << " or " << std::hex << std::showbase << std::numeric_limits<short>::min() << '\n'
              << "int: " << std::dec << std::numeric_limits<int>::min() << std::showbase
              << " or " << std::hex << std::numeric_limits<int>::min() << '\n' << std::dec 
              << "ptrdiff_t: " << std::numeric_limits<std::ptrdiff_t>::min() << std::showbase
              << " or " << std::hex << std::numeric_limits<std::ptrdiff_t>::min() << '\n'
              << "float: " << std::numeric_limits<float>::min()
              << " or " << std::hexfloat << std::numeric_limits<float>::min() << '\n'
              << "double: " << std::defaultfloat << std::numeric_limits<double>::min()
              << " or " << std::hexfloat << std::numeric_limits<double>::min() << '\n';
}

Output:

short: -32768 or 0x8000
int: -2147483648 or 0x80000000
ptrdiff_t: -9223372036854775808 or 0x8000000000000000
float: 1.17549e-38 or 0x1p-126
double: 2.22507e-308 or 0x1p-1022

[編集] も参照してください

[静的] (C++11)
指定された型の最小有限値を返します
Original:
returns the lowest finite value of the given type
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(公共の静的メンバ関数) [edit]
[静的]
与えられた浮動小数点型の最小の正の非正規の値を返します
Original:
returns the smallest positive subnormal value of the given floating-point type
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(公共の静的メンバ関数) [edit]
[静的]
指定された型の最大有限値を返します
Original:
returns the largest finite value of the given type
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(公共の静的メンバ関数) [edit]