Order of inputs and outputs. What goes where?

Question

is cout first or cin or int etc. or is there no difference. also what is the difference between ++x and x++ difference

Answer 1

There is no such thing as an "order". You use what you need, when you need it. If you need to declare a new variable, you will use data types such as int, char, string, bool etc. If you need to print something to the console, you will use std::cout, and if you need to take input from the user, you will use std::cin.
++x is a pre-increment. The value of x is incremented by one before it is used.
x++ is a post-increment. The value of x is incremented by one after it is used.