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std::numeric_limits::max_exponent10

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C++
 
Utilities-Bibliothek
 
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Grundtypen
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Basic types
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Grundtypen
Feste Breite Integer-Typen (C++11)
Numerische Grenzen
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Numeric limits
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numeric_limits
C numerische begrenzt Schnittstelle
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Runtime type information
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std::numeric_limits
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numeric_limits::max_digits10(C++11)
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numeric_limits::min_exponent10
numeric_limits::max_exponent
numeric_limits::max_exponent10
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static const int max_exponent10
 (bis C + +11)
static constexpr int max_exponent10
 (seit C++11)
Der Wert der std::numeric_limits<T>::max_exponent10 ist die größte positive Zahl n so dass 10n
 a darstellbar endlichen Wert der Fließkomma-Typ T ist .
Original:
The value of std::numeric_limits<T>::max_exponent10 is the largest positive number n such that 10n
 is a representable finite value of the floating-point type T.
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[Bearbeiten] Standard Spezialisierungen

T
Wert std::numeric_limits<T>::max_exponent10
Original:
value of std::numeric_limits<T>::max_exponent10
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/* non-specialized */ ​0​
bool ​0​
char ​0​
signed char ​0​
unsigned char ​0​
wchar_t ​0​
char16_t ​0​
char32_t ​0​
short ​0​
unsigned short ​0​
int ​0​
unsigned int ​0​
long ​0​
unsigned long ​0​
long long ​0​
unsigned long long ​0​
float FLT_MAX_10_EXP
double DBL_MAX_10_EXP
long double LDBL_MAX_10_EXP

[Bearbeiten] Beispiel

Demonstriert die Beziehungen max_exponent, max_exponent10 und max () für den Typ float:
Original:
Demonstrates the relationships of max_exponent, max_exponent10, and max() for the type float:
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#include <iostream>
int main()
{
    std::cout << "max() = " << std::numeric_limits<float>::max() << '\n'
              << "max_exponent10 = " << std::numeric_limits<float>::max_exponent10 << '\n'
              << std::hexfloat
              << "max() = " << std::numeric_limits<float>::max() << '\n'
              << "max_exponent = " << std::numeric_limits<float>::max_exponent << '\n';
}

Output: 

max() = 3.40282e+38
max_exponent10 = 38
max() = 0x1.fffffep+127
max_exponent = 128

[Bearbeiten] Siehe auch

[statisch]
das kleinste negative Zehnerpotenz, die eine gültige normalisierten Gleitkomma-Wert ist
Original:
the smallest negative power of ten that is a valid normalized floating-point value
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(public static Mitglied konstanten) [edit]
[statisch]
eine mehr als die größte ganze Macht der radix, die eine gültige endlichen Floating-Point-Wert ist
Original:
one more than the largest integer power of the radix that is a valid finite floating-point value
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(public static Mitglied konstanten) [edit]
max_exponent10
[statisch]
die größte ganzzahlige Potenz von 10, die eine gültige endlichen Floating-Point-Wert ist
Original:
the largest integer power of 10 that is a valid finite floating-point value
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(public static Mitglied konstanten) [edit]
Von „https://de.cppreference.com/mwiki/index.php?title=cpp/types/numeric_limits/max_exponent10&oldid=30317“