For each of the following data structure declarations, determine the offset of e

Question

For each of the following data structure declarations, determine the offset of each field,
the total size of the data structure, and its alignment requirement under Linux/IA64.

A) struct r1 { int array[4]; int sum; char ch1; };

B) struct r2 { size_t ul[3]; char ch2; double d1; };

C) struct r3 { short s[5]; char *p[2]; };

D) union u { double *d2 ; char ch3; struct r3 *next; };

(computer system language)

i use this book (
Computer Systems: A Programmer's Perspective 
Authors: Randal E. Bryant and David R. O'Hallaron 
Publisher: Addison Wesley; 2 
nd edition)

Explanation / Answer

A)

total size of structure is : 24 bytes

offset to array = 0

offset to sum = startaddress+4

offset to ch1 = startaddress+5

B)

total size of structure is : 40 bytes

offset to ul = 0

offset to ch2 = startaddress+3

offset to d1 = startaddress+4

c)

total size of structure is : 32 bytes

d)

8 bytes...

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