C - While sizeof of this struct is 8?

Question

#include <stdio.h>

typedef struct {
int bit1 : 1;
int bit2 : 2;
int bit30 : 30;
} bits;

int main() {
printf("%d", sizeof(bits));
return 0;
}

I expect it to be 4, but when sum of integers exceeds 32, it becomes 8. Why?

Answer 1

Int can have 32 bits - 4 bytes.
As number of bits used in ur struct is 33 bits. Next possible size is 2 ints = 8 bytes.
Bit fields in struct can have only int has members.

Answer 2

I think that for an integer variable with a value
from 0 to 29 4 bits of memory are allocated,
from 30 to 32 8 bits are allocated,
33 already requires the type of the variable long - for which 16 bits are already allocated, that is:
"long long bit33: 33;".

Я так думаю что для переменной типа integer со значением
от 0 до 29 выделяется 4 бита памяти,
от 30 до 32 выделяется 8 бит,
от 33 требуется уже тип переменной long - для которой уже выделяется 16 бит, то есть:
"long long bit33: 33;".

P.S:
"29 = 0b11101;
30 = 0b11110;
31 = 0b11111;
32 = 0b100000;
33 = 0b100001;".

Answer 3

Maybe it's a 64bit integer