C++ keyword: short

用法

• short 类型修饰符

示例

#include <climits>
#include <concepts>
#include <iostream>
#include <limits>
static_assert(sizeof(short) >= 16 / CHAR_BIT);
static_assert(sizeof(unsigned short) >= 16 / CHAR_BIT);
static_assert(std::numeric_limits<short>::min() <= -32'768); //'
static_assert(std::numeric_limits<short>::max() >= 32'767); //'
static_assert(std::numeric_limits<unsigned short>::max() >= 65'535u); //'
// 概念自 C++20 起可用
static_assert(std::integral<short> and std::integral<unsigned short>);
template <typename T, typename... Ts>
concept all_same = (... and std::same_as <T, Ts>);
static_assert(all_same<short, short int, signed short, signed short int>);
static_assert(all_same<unsigned short, unsigned short int>);
#define OUT(...) std::cout << #__VA_ARGS__ << " = " << __VA_ARGS__ << '\n'
int main()
{
    OUT(sizeof(short));
    OUT(sizeof(unsigned short));
    OUT(std::numeric_limits<short>::min());
    OUT(std::numeric_limits<short>::max());
    OUT(std::numeric_limits<unsigned short>::max());
}
#undef OUT

sizeof(short) = 2
sizeof(unsigned short) = 2
std::numeric_limits<short>::min() = -32768
std::numeric_limits<short>::max() = 32767
std::numeric_limits<unsigned short>::max() = 65535

参见

• 基础类型 : void , std::nullptr_t (C++11 起) 。
  • 整型 : int 。 修饰符 : signed , unsigned , short , long 。
    • 布尔类型 : bool 。 布尔字面量 : false , true 。
    • 字符类型 : char , char8_t (C++20 起) , char16_t , char32_t (C++11 起) , wchar_t 。
  • 浮点类型 : float , double 。