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)