[DUPLICATE] x++ and ++x?

Question

int a=3;
int b=2;
b=a++; //here b assign 3+1?
cout<<++b;
then the output is why not 1+4? i guess the output is 5 but it's 4.
plz explain this, i'm beginner and dumb at programming.

Answer 1

++x (prefix op) -> increments i and returns the value of i after the increment
x++ (postfix op) -> increments i and returns the value of i before the increment
Here b=a++;
Here value of b is 3 and will be 4.
cout<<++b;
Here value of b is 4

Answer 2

https://www.sololearn.com/Discuss/407846/?ref=app

Answer 3

b=3 and then a becomes 4 is what b=a++; does.

Answer 4

a++ only increments a, not b

Answer 5

x++ means first do what you have to do then add one to the variable.

++ x means the opposite, that is, before anything else add one variable.

at first I was also confused by this (in JavaScript) but then I got used to it.

OBS: the same goes for the --.