c++各种数据类型表示范围

符号属性长度属性基本型所占位数取值范围输入符举例输出符举例

--            --          char         8         -2^7 ~ 2^7-1        %c          %c、%d、%u
signed        --          char         8         -2^7 ~ 2^7-1        %c          %c、%d、%u
unsigned      --          char         8         0 ~ 2^8-1           %c          %c、%d、%u

[signed] short [int] 16 -2^15 ~ 2^15-1 %hd
unsigned short [int] 16 0 ~ 2^16-1 %hu、%ho、%hx

[signed] -- int 32 -2^31 ~ 2^31-1 %d
unsigned -- [int] 32 0 ~ 2^32-1 %u、%o、%x

[signed] long [int] 32 -2^31 ~ 2^31-1 %ld
unsigned long [int] 32 0 ~ 2^32-1 %lu、%lo、%lx

[signed] long long [int] 64 -2^63 ~ 2^63-1 %I64d
unsigned long long [int] 64 0 ~ 2^64-1 %I64u、%I64o、%I64x

--            --          float        32       +/- 3.40282e+038         %f、%e、%g
--            --          double       64       +/- 1.79769e+308 %lf、%le、%lg   %f、%e、%g
--            long        double       96       +/- 1.79769e+308        %Lf、%Le、%Lg

#include<iostream>

#include <limits>

using namespace std;

int main()

{

	//bool

	cout << "bool: \t\t" << "所占字节数：" << sizeof(bool);

	cout << "\t最大值：" << (numeric_limits<bool>::max)();

	cout << "\t\t最小值：" << (numeric_limits<bool>::min)() << endl;

	//char

	cout << "char: \t\t" << "所占字节数：" << sizeof(char);

	cout << "\t最大值：" << (numeric_limits<char>::max)();

	cout << "\t\t最小值：" << (numeric_limits<char>::min)() << endl;

	//signed char

	cout << "signed char: \t" << "所占字节数：" << sizeof(signed char);

	cout << "\t最大值：" << (numeric_limits<signed char>::max)();

	cout << "\t\t最小值：" << (numeric_limits<signed char>::min)() << endl;

	//unsigned char

	cout << "unsigned char: \t" << "所占字节数：" << sizeof(unsigned char);

	cout << "\t最大值：" << (numeric_limits<unsigned char>::max)();

	cout << "\t\t最小值：" << (numeric_limits<unsigned char>::min)() << endl;

	//wchar_t

	cout << "wchar_t: \t" << "所占字节数：" << sizeof(wchar_t);

	cout << "\t最大值：" << (numeric_limits<wchar_t>::max)();

	cout << "\t\t最小值：" << (numeric_limits<wchar_t>::min)() << endl;

	//short

	cout << "short: \t\t" << "所占字节数：" << sizeof(short);

	cout << "\t最大值：" << (numeric_limits<short>::max)();

	cout << "\t\t最小值：" << (numeric_limits<short>::min)() << endl;

	//int

	cout << "int: \t\t" << "所占字节数：" << sizeof(int);

	cout << "\t最大值：" << (numeric_limits<int>::max)();

	cout << "\t最小值：" << (numeric_limits<int>::min)() << endl;

	//unsigned

	cout << "unsigned: \t" << "所占字节数：" << sizeof(unsigned);

	cout << "\t最大值：" << (numeric_limits<unsigned>::max)();

	cout << "\t最小值：" << (numeric_limits<unsigned>::min)() << endl;

	//long

	cout << "long: \t\t" << "所占字节数：" << sizeof(long);

	cout << "\t最大值：" << (numeric_limits<long>::max)();

	cout << "\t最小值：" << (numeric_limits<long>::min)() << endl;

	//unsigned long

	cout << "unsigned long: \t" << "所占字节数：" << sizeof(unsigned long);

	cout << "\t最大值：" << (numeric_limits<unsigned long>::max)();

	cout << "\t最小值：" << (numeric_limits<unsigned long>::min)() << endl;

	//float

	cout << "float: \t\t" << "所占字节数：" << sizeof(float);

	cout << "\t最大值：" << (numeric_limits<float>::max)();

	cout << "\t最小值：" << (numeric_limits<float>::min)() << endl;

	//size_t

	cout << "size_t: \t" << "所占字节数：" << sizeof(size_t);

	cout << "\t最大值：" << (numeric_limits<size_t>::max)();

	cout << "\t最小值：" << (numeric_limits<size_t>::min)() << endl;

	//double

	cout << "double: \t" << "所占字节数：" << sizeof(double);

	cout << "\t最大值：" << (numeric_limits<double>::max)();

	cout << "\t最小值：" << (numeric_limits<double>::min)() << endl;

	//long long

	cout << "long long: \t" << "所占字节数：" << sizeof(long long);

	cout << "\t最大值：" << (numeric_limits<long long>::max)();

	cout << "\t最小值：" << (numeric_limits<long long>::min)() << endl;

	//long double

	cout << "long double: \t" << "所占字节数：" << sizeof(long double);

	cout << "\t最大值：" << (numeric_limits<long double>::max)();

	cout << "\t最小值：" << (numeric_limits<long double>::min)() << endl;

	return 0;

}

巴特西

c++各种数据类型表示范围

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