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std::numeric_limits::max(3) | C++ Standard Libary | std::numeric_limits::max(3) |
NAME¶
std::numeric_limits::max - std::numeric_limits::max
Synopsis¶
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)
// Run this code
#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¶
lowest returns the lowest finite value of the given type
[static] (C++11) (public static member function)
min returns the smallest finite value of the given type
[static] (public static member function)
2022.07.31 | http://cppreference.com |