We’ll now look at storing multiple structures in an array. As an example you might think of creating a record (structure) for each student in a class, consisting of the student’s name, year of birth and GPA. You could then store the information for all students in a class in an array with each array elements being a student structure. You’d thus have an array of structures.
Let’s practice! Rather than using student data, in today’s class we’d like to store the vertices of a polygon in an array of structures. Each vertex consists of an x- and a y-coordinate. In order to efficiently store these coordinates for a point we’ll define a new structure, called point_t, that stores these coordinates for a given point. The code window below already has such a structure defined.
Let’s warm up by quickly writing some functions that serve to assign values to a variable of type point_t and print the coordinates of a variable of type point_t.
write a function initializePoint() to which you pass a variable of type point_t (by reference) along with two floats, and that assigns the first float to the x-coordinate and the second float to the y-coordinate of the point.
write a function printPoint() to which you pass a variable of type point_t (by value) and that prints out the coordinates of the variable in the form (x,y).
