climits中的符号常量

最新推荐文章于 2025-08-04 20:31:57 发布

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本文展示了不同整型数据类型（如int, short, long等）的大小与取值范围，并利用C++代码示例介绍了如何获取这些信息。通过本文，读者可以了解各种整型变量在内存中占用的空间大小及它们能够表示的最大和最小值。

符号常量	表示
CHAR_BIT	char 的位数
CHAR_MAX	char 的最大值
CHAR_MIN	char 的最小值
SCHAR_MAX	signed char 的最大值
SCHAR_MIN	signed char 的最小值
UCHAR_MAX	unsigned char 的最大值
SHRT_MAX	short 的最大值
SHRT_MIN	short 的最小值
USHRT_MAX	unsigned short 的最大值
INT_MAX	int 的最大值
INT_MIN	int 的最小值
UNIT_MAX	unsigned int 的最大值
LONG_MAX	long 的最大值
LONG_MIN	long 的最小值
LONG_MAX	unsigned long 的最大值

#include <iostream>
#include <climits>
using namespace std;
int main()
{
    cout << "Size:" << endl;
    cout << "int is     "   << sizeof (int)     << "bytes." << endl;
    cout << "short is   "   << sizeof (short)   << "bytes." << endl;
    cout << "long is    "   << sizeof (long)    << "bytes." << endl << endl;

    cout << "Bits per byte = " << CHAR_BIT << endl << endl;

    cout << "Maximum values:" << endl;
    cout << "int:           "   << INT_MAX << endl;
    cout << "short:         "   << SHRT_MAX << endl;
    cout << "long:          "   << LONG_MAX << endl;
    cout << "char:          "   << CHAR_MAX << endl;
    cout << "signed char:   "   << SCHAR_MAX << endl;
    cout << "unsigned int: "   << UINT_MAX << endl;
    cout << "unsigned short:"   << USHRT_MAX << endl;
    cout << "unsigned long: "   << ULONG_MAX << endl;
    cout << "unsigned char: "   << UCHAR_MAX << endl << endl;

    cout << "Minimum values:" << endl;
    cout << "int:           "   << INT_MIN << endl;
    cout << "short:         "   << SHRT_MIN << endl;
    cout << "long:          "   << LONG_MIN <<endl;
    cout << "char:          "   << CHAR_MIN <<endl;
    cout << "signed char:   "   << SCHAR_MIN <<endl;

    system("pause");

    return 0;
}