[c++] 자료형

cpp에서 자료형에 대해서 알아봅시다.

카테고리	타입	바이트	최소	최대
Integer	int	4	-2,147,483,648	2,147,483,647
	unsigned int	4	0	4,294,967,295
	char	1	-128	127
	unsigned  char	1	0	255
	short	2	-32,768	23,767
	unsigned short	2	0	65,535
	long	4	-2,147,483,648	2,147,483,647
	unsigned long	4	0	263-1
	long long	8	-263-1	263-1
	usigned long long	8	0	264-1
Real Numbers	float	4	3.4 e 38	34.e - 38
	double	8	1.7 e308	1.7 e - 308
	long dobule	12
Boolen Numbers	bool	1	false (0)	true  (1 or 0이아닌수)

#include <iostream>
using namespace std;
 
int main() {
    cout << "sizeof(char) is " << sizeof(char) << " bytes " << endl;
    cout << "sizeof(short) is " << sizeof(short) << " bytes " << endl;
    cout << "sizeof(int) is " << sizeof(int) << " bytes " << endl;
    cout << "sizeof(long) is " << sizeof(long) << " bytes " << endl;
    cout << "sizeof(long long) is " << sizeof(long long) << " bytes " << endl;
    cout << "sizeof(float) is " << sizeof(float) << " bytes " << endl;
    cout << "sizeof(double) is " << sizeof(double) << " bytes " << endl;
    cout << "sizeof(long double) is " << sizeof(long double) << " bytes " << endl;
    cout << "sizeof(bool) is " << sizeof(bool) << " bytes " << endl;
    return 0;
}

sizeof는 크기를 반환합니다.