Size of struct containing double field

Question

Firstly, I understand byte padding in structs. But I have still a small test contain a double field in struct and I don\'t know how to explain this :

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Answer 1

What is strange to you (or I'm missing something)?

The logic is the same (the padding is according to the "biggest" primitive field in the struct (I mean - int, double, char, etc.))

As in single, you have

1 (sizeof(char)) + 3 (padding) + 4 (sizeof(int))

it's the same in data:

1 (sizeof(char)) + 
7 (padding, it's sizeof(double) - sizeof(char)) + 
8 (sizeof(double))

which is 16.