Simple and funny puzzle.

Question

Hey guys and girls.

First of all,before you'll post your answer be sure it have answer on each item here:

1.What's sum values on each step?
2.What's i value on each step?
3.How exectly increments and decrements works on each step?
4.X = ?

i = 1;
x = 0;

x = i++ + i++ + ++i + i++ + --i + ++i;

Good luck!

Answer 1

from left to rigt, at each addition step of expression;

x = i++; // <=> x += 1 (x == 1)
// x += (i == 1); (i += 1) == 2;

x += i++; // <=> x += 2 (x == 3)
// x += (i == 2); (i += 1) == 3

x += ++i; // <=> x += 4 (x == 7)
// (i += 1) == 4; x += (i == 4)

x += i++; // <=> x += 4 (x == 11)
// x += (i == 4); (i += 1) == 5

x += --i; // <=> x += 4 (x = 15)
// (i -= 1) == 4; x += (i == 4)

x += ++i; // <=> x += 5 (x = 20)
// (i += 1) == 5; x += (i == 5)

x == 1+2+4+4+4+5 == 20

Answer 2

x=1+2+4+4+4+5=20

Answer 3

@Yaroslav: :) lol. nothing like a little bit of increment operator abuse to hurt ones brain

Answer 4

Yep, that's all about abusing increments , but helps at undestanding how it works soooooo much :)

Good Job :)

It broke my brain once again even if I solved it like mounth ago , so I posted it for others :D

Visps's answer had most info , so his answer will be best I guess , he deserves it :)

Answer 5

hate this puzzles. especially at 1AM