toys/mathematics/geometry/colinear

Colinear

This program determines if three points on the cartesian plane are colinear. It takes six values as command line arguments, and it arranges these as ordered pairs like so:

argv[1] = x1
argv[2] = y1
argv[3] = x2
argv[4] = y2
argv[5] = x3
argv[6] = y3

It then creates three separate point-slope forms of a linear equation using the three points to make three slopes, and it compares these slopes to see if they are equal. If so, the three points are colinear.