What is the difference between int++ and ++int? [duplicate]

Answer 1

Every expression in C or C++ has a type, a value, and possible side-effects.

int i;
++i;

The type of ++i is int. The side-effect is to increment i. The value of the expression is the new value of i.

int i;
i++;

The type of i++ is int. The side-effect is to increment i. The value of the expression is the old value of i.