I know you probably didn't understand the question, but let me rephrase it in a different way.
Let's say you have a program that has 5 variables that need to be assigned a value.
This program will ask you to input values for each of the 5 variables, but you only want to input values for 3 variables, is it possible to skip the other 2 variables in the program?
Is it even possible to make cin dynamic? if so, how?