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std::numeric_limits::infinity

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static T infinity()
 (até C++11)
static constexpr T infinity()
 (desde C++11)
Retorna o valor especial "infinito positivo", representado pelo T tipo de ponto flutuante. Só faz sentido se std::numeric_limits<T>::has_infinity == true. Em IEEE 754, a representação binária mais comum de números de ponto flutuante, o infinito é o valor com todos os bits do expoente conjunto e todos os bits da fração limpo.
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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Índice

[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] Exceções

noexcept specification:  
noexcept
  (desde C++11)

[editar] Exemplo

#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';
}

Saída: 

inf is greater than 1.79769e+308


[editar] Veja também

[estática]
identifica tipos de ponto flutuante que pode representar o valor especial "infinito positivo"
Original:
identifies floating-point types that can represent the special value "positive infinity"
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(membro estático público constante) [edit]
Obtida de "https://pt.cppreference.com/mwiki/index.php?title=cpp/types/numeric_limits/infinity&oldid=24604"