Chapter 15 Structs
Imagine you are writing a program that makes use of lots of points on the x, y plane. Each point requires two doubles - an x coordinate and a y coordinate - to represent. We can create two variables like
x1 and y1 and think of the pair as our “point”, but there are many issues this will lead to:-
We have to remember that the variables “go” with each other. Other than the names looking similar, there is nothing that links the two together.
-
We have to pass two variables to functions to pass the “point”.
-
We can’t return two variables from a function. So there is no way to return a “point”.
-
We can’t store a list of points in a vector. Instead, would need one vector with x values and another with y values.
What we really need is a new data type that combines the two variables together.
In this chapter, we will learn to build our own new data types by aggregating (combing) multiple simpler pieces of data.
