std::numeric_limits::infinity – cppreference.com
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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.
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Rückgabewert
T
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std::numeric_limits<T>::infinity()
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| /* non-specialized */ | T();
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bool
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false
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char
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0
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signed char
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0
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unsigned char
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0
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wchar_t
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0
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char16_t
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0
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char32_t
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0
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short
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0
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unsigned short
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0
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int
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0
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unsigned int
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0
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long
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0
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unsigned long
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0
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long long
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unsigned long long
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0
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float
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HUGE_VALF |
double
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HUGE_VAL |
long double
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HUGE_VALL |
Ausnahmen
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
Siehe auch
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. (public static Mitglied konstanten) [edit] | |