std::numeric_limits::infinity
De cppreference.com
static T infinity()
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(hasta C++11) | |
static constexpr T infinity()
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(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.The text has been machine-translated via Google Translate.
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Valor de retorno
T
|
std::numeric_limits<T>::infinity()
|
| /* non-specialized */ | T();
|
bool
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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 |
Excepciones
Ejemplo
Ejecuta este código
#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