freeware http://groups.yahoo.com/group/mathc/

* Calculus : Cubic bezier curve.

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Windows : Dev-C++ 4
Linux : gcc abc.c -lm Return
a.out Return

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* You can compile the *.c files directly without create a project.

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c13b_1a.c : a curve.
c13b_1b.c : 2

c13b_2c.c : step 1
c13b_2d.c : step 2
c13b_2e.c : step 3
c13b_2f.c : r

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The members can try these links :

http://groups.yahoo.com/group/mathc/files/C/D/c13b.zip