graphics.h (determine a line)

[theCompiler]

im creating a cartesian plane i will plot the points but how am i supposed to determine if the points create a single straight line ? tnx

[theCompiler]

i will plot 3 points

[D33wakar]

i will plot 3 points

Here are some links that might help you.
http://www.mycplus.com/tutorials/c-programming-tutorials/graphics-programming/
http://electrosofts.com/cgraphics/
http://www.programmingsimplified.com/c-graphics-programming-tutorial

[kings_mitra]

If the points are collinear, the sum of the distances between two pairs of points equals the distance between the third pair of points.