c++如何查看字節

字節在計算機科學領域，字節指的是8位內存單元，常用byte/B表示，是度量計算機存儲空間大小的度量單位。我們説的1KB就是1024個字節，即1024*8位。

在C++裏，字節定義稍有不同。一個字節包含的位數可表示的狀態（例如8位可表示的狀態是256種）應足以覆蓋基本字符集（ASCII）字符的個數。通常的C++實現中使用的字符系統是ASCII，所以在通常C++實現中，一個字節就是8位。但是在一些採用Unicode字符系統的C++實現中，可能使用16位或者32位字節。

#include<iostream>

#include <limits>

using namespace std

int main()

{

cout << "type: tt" << "************size**************"<< endl

cout << "bool: tt" << "所佔字節數：" << sizeof(bool)

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

cout << "tt最小值：" << (numeric_limits<bool>::min)() << endl

cout << "char: tt" << "所佔字節數：" << sizeof(char)

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

cout << "tt最小值：" << (numeric_limits<char>::min)() << endl

cout << "signed char: t" << "所佔字節數：" << sizeof(signed char)

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

cout << "tt最小值：" << (numeric_limits<signed char>::min)() << endl

cout << "unsigned char: t" << "所佔字節數：" << sizeof(unsigned char)

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

cout << "tt最小值：" << (numeric_limits<unsigned char>::min)() << endl

cout << "wchar_t: t" << "所佔字節數：" << sizeof(wchar_t)

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

cout << "tt最小值：" << (numeric_limits<wchar_t>::min)() << endl

cout << "short: tt" << "所佔字節數：" << sizeof(short)

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

cout << "tt最小值：" << (numeric_limits<short>::min)() << endl

cout << "int: tt" << "所佔字節數：" << sizeof(int)

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

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

cout << "unsigned: t" << "所佔字節數：" << sizeof(unsigned)

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

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

cout << "long: tt" << "所佔字節數：" << 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" << "所佔字節數：" << 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" << "所佔字節數：" << 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" << "所佔字節數：" << 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: tt" << "所佔字節數：" << 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" << "所佔字節數：" << 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" << "所佔字節數：" << sizeof(string) << endl

// << "t最大值：" << (numeric_limits<string>::max)() << "t最小值：" << (numeric_limits<string>::min)() << endl

cout << "type: tt" << "************size**************"<< endl

return 0