.
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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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You can verify some result with octave.

x_pivotbest_mZ();

c3aa_1.c c3aa_1.txt : Presentation.
c3aa_2.c c3aa_2.txt : See how the best pivot is selected.
c3aa_3.c c3aa_3.txt : In brief the results of the function.

c3aa_4.c c3aa_4.txt : x_zero_under_pivot_mZ();
c3aa_4a.c c3aa_4a.txt : work with singular matrices.

c3aa_5.c c3aa_5.txt : x_det_Z();

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The members can try these links :

http://groups.yahoo.com/group/mathc/files/C/L/N/A/new3aaz.zip
http://groups.yahoo.com/group/mathc/files/C/L/N/new_1.zip