std::numeric_limits::lowest
De cppreference.com
static constexpr T lowest()
|
(desde C++11) | |
Devuelve el menor valor finito representable por la
T tipo numérico, es decir, un valor finito x de tal manera que no hay ningún otro valor finito y donde y < x. Esto es diferente de std::numeric_limits<T>::min() para tipos de punto flotante. Sólo tiene sentido para los tipos acotados .Original:
Returns the lowest finite value representable by the numeric type
T, that is, a finite value x such that there is no other finite value y where y < x. This is different from std::numeric_limits<T>::min() for floating-point types. Only meaningful for bounded types.The text has been machine-translated via Google Translate.
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Valor de retorno
T
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std::numeric_limits<T>::lowest()
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| /* non-specialized */ | T();
|
bool
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false
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char
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CHAR_MIN |
signed char
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SCHAR_MIN |
unsigned char
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0
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wchar_t
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WCHAR_MIN |
char16_t
|
0
|
char32_t
|
0
|
short
|
SHRT_MIN |
unsigned short
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0
|
int
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INT_MIN |
unsigned int
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0
|
long
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LONG_MIN |
unsigned long
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0
|
long long
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LLONG_MIN |
unsigned long long
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0
|
float
|
-FLT_MAX
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double
|
-DBL_MAX
|
long double
|
-LDBL_MAX
|
Notas
Si bien no es cierto para C + + fundamental flotante Poing tipos, un tercero tipo de punto flotante
T puede existir tal que std::numeric_limits<T>::lowest() != -std::numeric_limits<T>::max() .Original:
While it's not true for fundamental C++ floating-poing types, a third-party floating-point type
T may exist such that std::numeric_limits<T>::lowest() != -std::numeric_limits<T>::max().The text has been machine-translated via Google Translate.
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Excepciones
Ejemplo
Demuestra mínimo, máximo, mínimo y para tipos de punto flotante
Original:
Demonstrates min, max, and lowest for floating-point types
The text has been machine-translated via Google Translate.
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Ejecuta este código
#include <limits>
#include <iostream>
int main()
{
std::cout << "std::numeric_limits<T>::min():\n"
<< "\tfloat: " << std::numeric_limits<float>::min()
<< " or " << std::hexfloat << std::numeric_limits<float>::min() << '\n'
<< "\tdouble: " << std::defaultfloat << std::numeric_limits<double>::min()
<< " or " << std::hexfloat << std::numeric_limits<double>::min() << '\n';
std::cout << "std::numeric_limits<T>::lowest():\n"
<< "\tfloat: " << std::defaultfloat << std::numeric_limits<float>::lowest()
<< " or " << std::hexfloat << std::numeric_limits<float>::lowest() << '\n'
<< "\tdouble: " << std::defaultfloat << std::numeric_limits<double>::lowest()
<< " or " << std::hexfloat << std::numeric_limits<double>::lowest() << '\n';
std::cout << "std::numeric_limits<T>::max():\n"
<< "\tfloat: " << std::defaultfloat << std::numeric_limits<float>::max()
<< " or " << std::hexfloat << std::numeric_limits<float>::max() << '\n'
<< "\tdouble: " << std::defaultfloat << std::numeric_limits<double>::max()
<< " or " << std::hexfloat << std::numeric_limits<double>::max() << '\n';
}
Salida:
std::numeric_limits<T>::min():
float: 1.17549e-38 or 0x1p-126
double: 2.22507e-308 or 0x1p-1022
std::numeric_limits<T>::lowest():
float: -3.40282e+38 or -0x1.fffffep+127
double: -1.79769e+308 or -0x1.fffffffffffffp+1023
std::numeric_limits<T>::max():
float: 3.40282e+38 or 0x1.fffffep+127
double: 1.79769e+308 or 0x1.fffffffffffffp+1023