c語言limits.h

C ++宏常量(整數類型的大小) (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，我們將學習一些定義的宏常量 ，這些常量用于查找整數類型的大小，例如字符，短整數，長整數，長整數。 這些宏常量用于查找任何整數類型的數據類型的最小和最大大小。

These macros are defined in <limits.h> header file and <climits> header (for C++ 11).

這些宏在<limits.h>頭文件和<climits>頭文件中定義(對于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.

此處是宏常量列表，可用于查找特定整數數據類型的大小，最小值和最大值 。

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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

宏常數 描述 值*

CHAR_BIT	它在char對象中返回其編號。	8
SCHAR_MIN	它返回簽名的char對象的最小值。	-128
SCHAR_MAX	它返回已簽名char對象的最大值。	127
UCHAR_MAX	它返回一個無符號char對象的最大值。	255
CHAR_MIN	它返回一個char對象的最小值。	0或SCHAR_MIN
CHAR_MAX	它返回一個char對象的最大值	SCHAR_MAX或UCHAR_MAX
MB_LEN_MAX	對于任何語言環境，它將返回多字節字符中的最大字節數	1或更大
SHRT_MIN	它返回帶符號的short int對象的最小值。	-32768
SHRT_MAX	它返回一個有符號的short int對象的最大值。	32767
USHRT_MAX	它返回一個無符號short int對象的最大值。	65535
INT_MIN	它返回一個有符號的int對象的最小值。	-32768或-2147483648
INT_MAX	它返回一個有符號的int對象的最大值。	32767或2147483647
UINT_MAX	它返回一個無符號int對象的最大值。	65535或4294967295
LONG_MIN	它返回一個有符號的long int對象的最小值。	-2147483648或-9223372036854775808
LONG_MAX	它返回一個有符號的long int對象的最大值。	2147483647或9223372036854775807
ULONG_MAX	它返回一個無符號long int對象的最大值。	4294967295或18446744073709551615
LLONG_MIN	它返回一個有符號long long int對象的最小值。	-9223372036854775808
LLONG_MAX	它返回一個有符號long long int對象的最大值。	9223372036854775807
ULLONG_MAX	它返回一個無符號long long int對象的最大值。	18446744073709551615

* The actual value depends on the compiler architecture or library implementation.

*實際值取決于編譯器體系結構或庫的實現。

Reference: C++ <climits> (limits.h)

參考： C ++ <climits>(limits.h)

C ++程序打印整數類型的大小 (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

輸出量

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

翻譯自: https://www.includehelp.com/cpp-tutorial/macro-constants-of-sizes-of-integral-types.aspx

c語言limits.h

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