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std::numeric_limits::infinity

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std::numeric_limits
 
static T infinity()
(hasta C++11)
static constexpr T infinity()
(desde C++11)
Devuelve el valor especial "infinito positivo", representado por el T tipo de punto flotante. Sólo tiene sentido si std::numeric_limits<T>::has_infinity == true. En IEEE 754, la representación binaria más común de números de punto flotante, el infinito positivo es el valor con todos los bits del conjunto de exponente y todos los bits de la fracción aclaró .
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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Contenido

[editar] Valor de retorno

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

[editar] Excepciones

noexcept specification:  
noexcept
  (desde C++11)

[editar] Ejemplo

#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';
}

Salida:

inf is greater than 1.79769e+308


[editar] Ver también

[estático]
identifica tipos de punto flotante que puede representar el valor especial "infinito positivo"
Original:
identifies floating-point types that can represent the special value "positive infinity"
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(miembro público estático constante) [editar]