a: #1 Andi Pratama   3.5 kg Rp 24500
b: #2 Budi Santoso   2.0 kg Rp 20000
c: #3 Citra          0.0 kg Rp 0 (members not named are 0)
copy: #99 Xndi Pratama | a is still #1 Andi Pratama
a and b hold the same order? no
sizeof(struct Order) = 40, members add up to 38
offsets: id 0, customer 4, tenths 28, amount 32
