sizeof 연산자를 이용한 Data Type 크기 확인

#include <stdio.h> int main() { printf("Integer Type:\n"); printf("%8s %11s : %2d\n", "signed", "char", sizeof(signed char)); printf("%8s %11s : %2d\n", "unsigned", "char", sizeof(unsigned char)); printf("\n"); printf("%8s %11s : %2d\n", "signed", "short int", sizeof(signed short int)); printf("%8s %11s : %2d\n", "unsigned", "short int", sizeof(unsigned short int)); printf("\n"); printf("%8s %11s : %2d\n", "signed", "int", sizeof(signed int)); printf("%8s %11s : %2d\n", "unsigned", "int", sizeof(unsigned int)); printf("\n"); printf("%8s %11s : %2d\n", "signed", "long int", sizeof(signed long)); printf("%8s %11s : %2d\n", "unsigned", "long int", sizeof(unsigned long)); printf("\n"); printf("Real Number Type:\n"); printf("%8s %11s : %2d\n", "", "float", sizeof(float)); printf("%8s %11s : %2d\n", "", "double", sizeof(double)); printf("%8s %11s : %2d\n", "", "long double", sizeof(long double)); return 0; }

RESULT------------------------------------------------------------------------------------------------------------- Integer Type: signed char : 1 unsigned char : 1 signed short int : 2 unsigned short int : 2 signed int : 4 unsigned int : 4 signed long int : 4 unsigned long int : 4 Real Number Type: float : 4 double : 8 long double : 12 RESULT-------------------------------------------------------------------------------------------------------------