std::numeric_limits<T>::max
Defined in header <limits> |
||
---|---|---|
static T max() throw(); |
(until C++11) | |
static constexpr T max() noexcept; |
(since C++11) |
Returns the maximum finite value representable by the numeric type T
. Meaningful for all bounded types.
Return value
T |
std::numeric_limits<T>::max() |
---|---|
/* non-specialized */ | T() |
bool |
true |
char |
CHAR_MAX |
signed char |
SCHAR_MAX |
unsigned char |
UCHAR_MAX |
wchar_t |
WCHAR_MAX |
char8_t (C++20) |
UCHAR_MAX |
char16_t (C++11) |
UINT_LEAST16_MAX |
char32_t (C++11) |
UINT_LEAST32_MAX |
short |
SHRT_MAX |
unsigned short |
USHRT_MAX |
int |
INT_MAX |
unsigned int |
UINT_MAX |
long |
LONG_MAX |
unsigned long |
ULONG_MAX |
long long (C++11) |
LLONG_MAX |
unsigned long long (C++11) |
ULLONG_MAX |
float |
FLT_MAX |
double |
DBL_MAX |
long double |
LDBL_MAX |
Example
Demonstrates the use of max() with some fundamental types and some standard library typedefs (the output is system-specific).
#include <limits> #include <cstddef> #include <iostream> int main() { std::cout << "short: " << std::dec << std::numeric_limits<short>::max() << " or " << std::hex << std::showbase << std::numeric_limits<short>::max() << '\n' << "int: " << std::dec << std::numeric_limits<int>::max() << " or " << std::hex << std::numeric_limits<int>::max() << '\n' << std::dec << "streamsize: " << std::dec << std::numeric_limits<std::streamsize>::max() << " or " << std::hex << std::numeric_limits<std::streamsize>::max() << '\n' << "size_t: " << std::dec << std::numeric_limits<std::size_t>::max() << " or " << std::hex << std::numeric_limits<std::size_t>::max() << '\n' << "float: " << std::numeric_limits<float>::max() << " or " << std::hexfloat << std::numeric_limits<float>::max() << '\n' << "double: " << std::defaultfloat << std::numeric_limits<double>::max() << " or " << std::hexfloat << std::numeric_limits<double>::max() << '\n'; }
Possible output:
short: 32767 or 0x7fff int: 2147483647 or 0x7fffffff streamsize: 9223372036854775807 or 0x7fffffffffffffff size_t: 18446744073709551615 or 0xffffffffffffffff float: 3.40282e+38 or 0x1.fffffep+127 double: 1.79769e+308 or 0x1.fffffffffffffp+1023
See also
[static] (C++11)
|
returns the lowest finite value of the given type (public static member function) |
[static]
|
returns the smallest finite value of the given type (public static member function) |
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