size of structure

Hi,
I have 2 structures like this:

Code:

---

struct A
{
 char i;
 char j;
};

---

Code:

---

struct B
{
 char i;
 char j;
 int k;
};

---

and it is quite obvious that sizeof(A) == 2, but why sizeof(B) == 8?
Does anybody know where I could read something about how does compiler allocates memory?

Quote:

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Originally Posted by Leone

and it is quite obvious that sizeof(A) == 2, but why sizeof(B) == 8?

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Probably because two bytes of padding are inserted after j so that k can be aligned along a word boundary.

Quote:

---

Originally Posted by Leone

Does anybody know where I could read something about how does compiler allocates memory?

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Search the Web for say, data structure alignment. Note that this is indeed implementation defined.