C++的数据类型

最新推荐文章于 2025-05-30 09:14:39 发布

陈海明hack

最新推荐文章于 2025-05-30 09:14:39 发布

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分类专栏： C++

本文链接：https://blog.youkuaiyun.com/chenhaiming123/article/details/97482017

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本文展示了一个C++程序，用于打印各种基本数据类型的大小及其数值范围，包括bool、char、int、double等，利用了numeric_limits模板类来获取最大值和最小值。

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一、操作步骤

https://www.runoob.com/cplusplus/cpp-environment-setup.html

二、实例

#include<iostream>  
#include<string>  
#include <limits>  
using namespace std;

int main()
{
	cout << "type: \t\t" << "************size**************" << endl;
	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;
	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;
	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;
	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;
	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;
	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;
	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;
	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;
	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;
	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;
	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;
	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;
	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;
	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;
	cout << "string: \t" << "所占字节数：" << sizeof(string) << endl;
	// << "\t最大值：" << (numeric_limits<string>::max)() << "\t最小值：" << (numeric_limits<string>::min)() << endl;  
	cout << "type: \t\t" << "************size**************" << endl;
	system("pause");
	return 0;

}

运行结果：