C语言中关键字所占用字节大小

#include <stdio.h>

void main(){
    /*int 字节*/
    printf("%d\n",sizeof(int)); //4 
    printf("%d\n",sizeof(__int8)); //1
    printf("%d\n",sizeof(__int16)); //2
    printf("%d\n",sizeof(__int32)); //4
    printf("%d\n",sizeof(__int64)); //8
    /*char 字节*/
    printf("%d\n",sizeof(char)); //1
    /*double 字节*/
    printf("%d\n",sizeof(double)); //8
    /*long 字节*/
    printf("%d\n",sizeof(long)); //4
    printf("%d\n",sizeof(long int)); //4
    printf("%d\n",sizeof(long long)); //8
    /*short 字节*/
    printf("%d\n",sizeof(short)); //2 
    printf("%d\n",sizeof(short int)); //2
    /*unsigned 字节*/
 &nbs