std::numeric_limits::infinity
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| static T infinity() |
(bis C + +11) | |
| static constexpr T infinity() |
(seit C++11) | |
Gibt den besonderen Wert "positive Unendlichkeit", wie von der Fließkomma-Typ
T vertreten. Nur sinnvoll, wenn std::numeric_limits<T>::has_infinity == true. In IEEE 754, die häufigste Binärdarstellung von Floating-Point-Zahlen, ist die positive Unendlichkeit der Wert mit allen Bits des Exponenten Set und alle Bits der Fraktion gelöscht .Original:
Returns the special value "positive infinity", as represented by the floating-point type
T. Only meaningful if std::numeric_limits<T>::has_infinity == true. In IEEE 754, the most common binary representation of floating-point numbers, the positive infinity is the value with all bits of the exponent set and all bits of the fraction cleared.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Inhaltsverzeichnis |
[Bearbeiten] Rückgabewert
T
|
std::numeric_limits<T>::infinity() |
| /* non-specialized */ | T();
|
| bool | false |
| 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 | HUGE_VALF |
| double | HUGE_VAL |
| long double | HUGE_VALL |
[Bearbeiten] Ausnahmen
[Bearbeiten] Beispiel
#include <iostream> #include <limits> int main() { double max = std::numeric_limits<double>::max(); double inf = std::numeric_limits<double>::infinity(); if(inf > max) std::cout << inf << " is greater than " << max << '\n'; }
Output:
inf is greater than 1.79769e+308
[Bearbeiten] Siehe auch
| [statisch] |
identifiziert Floating-Point-Typen, die den besonderen Wert "positive Unendlichkeit" darstellen kann Original: identifies floating-point types that can represent the special value "positive infinity" The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (public static Mitglied konstanten) |
