I tried to run program on NETBEANS IDE but not getting correct results

CSC161Feb06InClass /*Ex1 b = 5; a = 4; y1, y2, y3 integers Display and explain the results of the following b += b // a++ // a = = 4 ++a // = 4; y1 = a++ + ++a a = // a = 4; y2 = a-- + ++a // a = 4; y3 = a++ + --a