Adding vector functions (dot product, cross product, and area/volume of parallelograms, cubes) #2912
Description
I am taking an intro to software engineering course in college and need to contribute to a repo on github, I was hoping it would be ok to contribute to and add these vector functions under algorithms.
Test case:
int[] vector1 = new int[]{1,0,1};
int[] vector2 = new int[]{1,1,1};
int [] result = crossProduct(vector1, vector2);
result would store {-1,0,1}