C++ Incrementing

Question

Can someone explain the difference between
x++;
and
++x;
I know the first is post increment is the second is pre increment but I'm not sure how their is a difference. Could someone explain using numbers other than 1 and 2 to further assist me?
Any help would be greatly appreciated!! thank you.

Answer 1

https://www.sololearn.com/discuss/223343/?ref=app

Answer 2

x++ post increment, first evaluate then increment

++x pre increment, first increment then evaluate

Answer 3

the best to explain it is if you use those inside of if statements or loops or when you print them

for example
int a = 3;

cout << ++a; // prints 4 because the ++ in front means it does the incrementation directly

cout << a++; // prints 3 because the ++ is after it and that means that it will be done after the statement is executed, in functions the postfix incrementation is done at the end of the function

Answer 4

It's not difficult,
in the first case you use the variable and than you increment it
for example:
x = 0;
a = x++;
now:
a is 0 (the value of x before the increment)
and x is 1 (because you have incremented it with "++" )

In the second case instead, you increment the variable before use it,
for example
x = 0;
a = ++x;
now:
x is 1 (because you have incremented it) and
a is 1 (the value of x after the increment)

I hope I've helped you :)

p.s. Sorry if my English is not very good, it's not my language.

Answer 5

Devender Mahajan Is incrementing in Java and C++ the same?

Answer 6

Yes it same in C++ and Java. Sorry for delayed response.

Answer 7

"Devender Mahajan Is incrementing in Java and C++ the same?"

yes, it is ;)

Answer 8

x++ post increment, first evaluate then increment

++x pre increment, first increment then evaluate
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This is thw best answer by Clau.