C++常用语法知识--数据类型

C++常用语法知识--数据类型

C++为用户提供了7种基本C++数据类型：

类型	关键字	字节大小
布尔型	bool	1
字符型	char	1
有符号字符型	signed char	1
无符号字符型	unsigned char	1
整型	int	4
有符号整型	signed int	4
无符号整型	unsigned int	4
短整型	short int	2
长整型	long int	4
有符号长整型	signed long int	4
无符号长整型	unsigned long int	4
有符号短整型	signed int	2
无符号短整型	unsigned int	2
浮点型	float	4
双浮点型	double	8
长双浮点型	long double	16
无类型	void	1
宽字符型	wchar_t	2

代码

#include <iostream>
using namespace std;

int main(){
	cout <<"Size of bool:"<< sizeof(bool)<<endl;
	cout <<"Size of char:"<< sizeof(char)<<endl;
	cout <<"Size of signed char:"<< sizeof(signed char)<<endl;
	cout <<"Size of unsigned char:"<< sizeof(unsigned char)<<endl;
	cout <<"Size of int:"<<sizeof(int)<<endl;
	cout <<"Size of signed int:"<<sizeof(signed int)<<endl;
	cout <<"Size of unsigned int:"<<sizeof(unsigned int)<<endl;
	cout <<"Size of short int:" <<sizeof(short int)<<endl;
	cout <<"Size of signed short int:"<<sizeof(signed short int)<<endl;
	cout <<"Size of unsigned short int:"<<sizeof(unsigned short int)<<endl;
	cout << "Size of long int:" <<sizeof(long int)<<endl;
	cout <<"Size of signed long int:"<<sizeof(signed long int)<<endl;
	cout <<"Size of unsigned long int:"<<sizeof(unsigned long int)<<endl;
	cout<<"Size of float:"<<sizeof(float)<<endl;
	cout<<"Size of double:"<<sizeof(double)<<endl;
	cout<<"Size of long double:"<<sizeof(long double)<<endl;
	
	cout<<"Size of wchar_t:"<<sizeof(wchar_t)<<endl;
	return 0;

}

结果显示：