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  • c++中各种数据类型所占字节

    求各种数据类型所占用的字节数可调用sizeof函数,求各种数据类型的最大值可以调用limits标准库中的numeric_limits<T>::max(),numeric_limits<T>::min()函数
    #include<iostream>  
    #include<string>  
    #include <limits>  
    using namespace std;
    
    int main()
    {	
    	cout << "type: 		" << "************size**************" << endl;
    	cout << "bool: 		" << "所占字节数:" << sizeof(bool);
    	cout << "	最大值:" << (numeric_limits<bool>::max)();
    	cout << "		最小值:" << (numeric_limits<bool>::min)() << endl;
    	cout << "char: 		" << "所占字节数:" << sizeof(char);
    	cout << "	最大值:" << (numeric_limits<char>::max)();
    	cout << "		最小值:" << (numeric_limits<char>::min)() << endl;
    	cout << "signed char: 	" << "所占字节数:" << sizeof(signed char);
    	cout << "	最大值:" << (numeric_limits<signed char>::max)();
    	cout << "		最小值:" << (numeric_limits<signed char>::min)() << endl;
    	cout << "unsigned char: 	" << "所占字节数:" << sizeof(unsigned char);
    	cout << "	最大值:" << (numeric_limits<unsigned char>::max)();
    	cout << "		最小值:" << (numeric_limits<unsigned char>::min)() << endl;
    	cout << "wchar_t: 	" << "所占字节数:" << sizeof(wchar_t);
    	cout << "	最大值:" << (numeric_limits<wchar_t>::max)();
    	cout << "		最小值:" << (numeric_limits<wchar_t>::min)() << endl;
    	cout << "short: 		" << "所占字节数:" << sizeof(short);
    	cout << "	最大值:" << (numeric_limits<short>::max)();
    	cout << "		最小值:" << (numeric_limits<short>::min)() << endl;
    	cout << "int: 		" << "所占字节数:" << sizeof(int);
    	cout << "	最大值:" << (numeric_limits<int>::max)();
    	cout << "	最小值:" << (numeric_limits<int>::min)() << endl;
    	cout << "unsigned: 	" << "所占字节数:" << sizeof(unsigned);
    	cout << "	最大值:" << (numeric_limits<unsigned>::max)();
    	cout << "	最小值:" << (numeric_limits<unsigned>::min)() << endl;
    	cout << "long: 		" << "所占字节数:" << sizeof(long);
    	cout << "	最大值:" << (numeric_limits<long>::max)();
    	cout << "	最小值:" << (numeric_limits<long>::min)() << endl;
    	cout << "unsigned long: 	" << "所占字节数:" << sizeof(unsigned long);
    	cout << "	最大值:" << (numeric_limits<unsigned long>::max)();
    	cout << "	最小值:" << (numeric_limits<unsigned long>::min)() << endl;
    	cout << "double: 	" << "所占字节数:" << sizeof(double);
    	cout << "	最大值:" << (numeric_limits<double>::max)();
    	cout << "	最小值:" << (numeric_limits<double>::min)() << endl;
    	cout << "long double: 	" << "所占字节数:" << sizeof(long double);
    	cout << "	最大值:" << (numeric_limits<long double>::max)();
    	cout << "	最小值:" << (numeric_limits<long double>::min)() << endl;
    	cout << "float: 		" << "所占字节数:" << sizeof(float);
    	cout << "	最大值:" << (numeric_limits<float>::max)();
    	cout << "	最小值:" << (numeric_limits<float>::min)() << endl;
    	cout << "size_t: 	" << "所占字节数:" << sizeof(size_t);
    	cout << "	最大值:" << (numeric_limits<size_t>::max)();
    	cout << "	最小值:" << (numeric_limits<size_t>::min)() << endl;
    	cout << "string: 	" << "所占字节数:" << sizeof(string) << endl;
    	// << "	最大值:" << (numeric_limits<string>::max)() << "	最小值:" << (numeric_limits<string>::min)() << endl;  
    	cout << "type: 		" << "************size**************" << endl;
    	system("pause");
    	return 0;
    }
    QQ图片20160424103343
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  • 原文地址:https://www.cnblogs.com/ql698214/p/5426471.html
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