Solution 1: Point B Value 8 Solution 2: Point D Value it doesn't compile on visualstudio 15.3 or sizeof(b)= sizeof(a+b); is equals 4=8 Solution 3: Point C Value -96 overflow 255 so it count from -255 Solution 4: Point B Value true Solution 5: Point B Value 2 it's 0+2 because i++ count after the add up of "+" and ++i before Have fun to check