c语言limits.h
C ++宏常量(整数类型的大小) (C++ Macro constants of (sizes of integral types))
In this tutorial, we are learning about some of the defined macro constants which are used to find the sizes of the integral types like a character, short, integer, long integer, long long integer. These macro constants are used to find the minimum and maximum size of any integral type of data type.
在本教程中，我们将学习一些定义的宏常量 ，这些常量用于查找整数类型的大小，例如字符，短整数，长整数，长整数。 这些宏常量用于查找任何整数类型的数据类型的最小和最大大小。
These macros are defined in <limits.h> header file and <climits> header (for C++ 11).
这些宏在<limits.h>头文件和<climits>头文件中定义(对于C ++ 11)。
C ++中的宏常量列表 (List of Macro constants in C++)
Here, is the list of the macro constants that can be used to find the sizes, minimum and maximum values of the specific integral data types.
此处是宏常量列表，可用于查找特定整数数据类型的大小，最小值和最大值 。
| Macro constant | Description | Value* |
|---|---|---|
| CHAR_BIT | It returns the number of its in a char object. | 8 |
| SCHAR_MIN | It returns the minimum value of a signed char object. | -128 |
| SCHAR_MAX | It returns the maximum value of a signed char object. | 127 |
| UCHAR_MAX | It returns the maximum value of an unsigned char object. | 255 |
| CHAR_MIN | It returns the minimum value of a char object. | 0 or SCHAR_MIN |
| CHAR_MAX | It returns the maximum value of a char object | SCHAR_MAX or UCHAR_MAX |
| MB_LEN_MAX | It returns the maximum number of bytes in a multibyte character, for any locale | 1 or greater |
| SHRT_MIN | It returns the minimum value of a signed short int object. | -32768 |
| SHRT_MAX | It returns the maximum value of a signed short int object. | 32767 |
| USHRT_MAX | It returns the maximum value of an unsigned short int object. | 65535 |
| INT_MIN | It returns the minimum value of a signed int object. | -32768 or -2147483648 |
| INT_MAX | It returns the maximum value of a signed int object. | 32767 or 2147483647 |
| UINT_MAX | It returns the maximum value of an unsigned int object. | 65535 or 4294967295 |
| LONG_MIN | It returns the minimum value of a signed long int object. | -2147483648 or -9223372036854775808 |
| LONG_MAX | It returns the maximum value of a signed long int object. | 2147483647 or 9223372036854775807 |
| ULONG_MAX | It returns the maximum value of an unsigned long int object. | 4294967295 or 18446744073709551615 |
| LLONG_MIN | It returns the minimum value of a signed long long int object. | -9223372036854775808 |
| LLONG_MAX | It returns the maximum value of a signed long long int object. | 9223372036854775807 |
| ULLONG_MAX | It returns the maximum value of an unsigned long long int object. | 18446744073709551615 |
| 宏常数 | 描述 | 值* |
|---|---|---|
| CHAR_BIT | 它在char对象中返回其编号。 | 8 |
| SCHAR_MIN | 它返回签名的char对象的最小值。 | -128 |
| SCHAR_MAX | 它返回已签名char对象的最大值。 | 127 |
| UCHAR_MAX | 它返回一个无符号char对象的最大值。 | 255 |
| CHAR_MIN | 它返回一个char对象的最小值。 | 0或SCHAR_MIN |
| CHAR_MAX | 它返回一个char对象的最大值 | SCHAR_MAX或UCHAR_MAX |
| MB_LEN_MAX | 对于任何语言环境，它将返回多字节字符中的最大字节数 | 1或更大 |
| SHRT_MIN | 它返回带符号的short int对象的最小值。 | -32768 |
| SHRT_MAX | 它返回一个有符号的short int对象的最大值。 | 32767 |
| USHRT_MAX | 它返回一个无符号short int对象的最大值。 | 65535 |
| INT_MIN | 它返回一个有符号的int对象的最小值。 | -32768或-2147483648 |
| INT_MAX | 它返回一个有符号的int对象的最大值。 | 32767或2147483647 |
| UINT_MAX | 它返回一个无符号int对象的最大值。 | 65535或4294967295 |
| LONG_MIN | 它返回一个有符号的long int对象的最小值。 | -2147483648或-9223372036854775808 |
| LONG_MAX | 它返回一个有符号的long int对象的最大值。 | 2147483647或9223372036854775807 |
| ULONG_MAX | 它返回一个无符号long int对象的最大值。 | 4294967295或18446744073709551615 |
| LLONG_MIN | 它返回一个有符号long long int对象的最小值。 | -9223372036854775808 |
| LLONG_MAX | 它返回一个有符号long long int对象的最大值。 | 9223372036854775807 |
| ULLONG_MAX | 它返回一个无符号long long int对象的最大值。 | 18446744073709551615 |
* The actual value depends on the compiler architecture or library implementation.
*实际值取决于编译器体系结构或库的实现。
Reference: C++ <climits> (limits.h)
参考： C ++ <climits>(limits.h)
C ++程序打印整数类型的大小 (C++ program to print the size of integral types)
// C++ program to print the size of integral types
#include<iostream>
#include<climits>
using namespace std;
int main()
{
cout << "CHAR_BIT " << CHAR_BIT << endl;
cout << "SCHAR_MIN " << SCHAR_MIN << endl;
cout << "SCHAR_MAX " << SCHAR_MAX << endl;
cout << "UCHAR_MAX " << UCHAR_MAX << endl;
cout << "CHAR_MIN " << CHAR_MIN << endl;
cout << "CHAR_MAX " << CHAR_MAX << endl;
cout << "MB_LEN_MAX " << MB_LEN_MAX << endl;
cout << "SHRT_MIN " << SHRT_MIN << endl;
cout << "SHRT_MAX " << SHRT_MAX << endl;
cout << "USHRT_MAX " << USHRT_MAX << endl;
cout << "INT_MIN " << INT_MIN << endl;
cout << "INT_MAX " << INT_MAX << endl;
cout << "UINT_MAX " << UINT_MAX << endl;
cout << "LONG_MIN " << LONG_MIN << endl;
cout << "LONG_MAX " << LONG_MAX << endl;
cout << "ULONG_MAX " << ULONG_MAX << endl;
cout << "LLONG_MIN " << LLONG_MIN << endl;
cout << "LLONG_MAX " << LLONG_MAX << endl;
cout << "ULLONG_MAX " << ULLONG_MAX << endl;
return 0;
}
Output
输出量
CHAR_BIT 8
SCHAR_MIN -128
SCHAR_MAX 127
UCHAR_MAX 255
CHAR_MIN -128
CHAR_MAX 127
MB_LEN_MAX 16
SHRT_MIN -32768
SHRT_MAX 32767
USHRT_MAX 65535
INT_MIN -2147483648
INT_MAX 2147483647
UINT_MAX 4294967295
LONG_MIN -9223372036854775808
LONG_MAX 9223372036854775807
ULONG_MAX 18446744073709551615
LLONG_MIN -9223372036854775808
LLONG_MAX 9223372036854775807
ULLONG_MAX 18446744073709551615
翻译自: https://www.includehelp.com/cpp-tutorial/macro-constants-of-sizes-of-integral-types.aspx
c语言limits.h
