In this recipe, we will learn to take input faster from the user. We will ask the user to enter a number and the entered number will be displayed on the screen. We will make use of the getchar_unlocked() function for this purpose.
The getchar_unlocked() function works similarly to getchar() function, with the difference that it is not thread-safe. As a result, it overlooks certain input constraints and so is quite a bit faster than getchar(). It is used for taking long input data in a situation where a single thread is being used for handling input and other streams.
