C program.....why does this program return size 24?

Question

Size of operator
https://code.sololearn.com/czCnEtHpYjWN/?ref=app

Answer 1

The size of a structure is equal to 'or greater than' the sum of the sizes of its members.
For example,

struct s {
char ch;
int i;
double f;
} s_var;

Here, sizeof(s_var) is at least 13 (8+4+1).
However, the size of 's_var' might be greater because the compiler is allowed to pad a structure in order to achieve word or paragraph alignment. (A paragraph is 16 bytes.) Since the size of a structure may be greater than the sum of the sizes of its members, you should always use 'sizeof' when you need to know the size of a structure.