[Help-glpk] how to read files in *.txt format

[Ricardo A. Castro]

Dear Andrew,

I'm begining to apply LP problem to my research (My 1th time in a real LP
problem and program) and It's just a part of my work, please I thank you
very much about your reply.

So, I have a difficulty finding a solution to my LP problem. Here are some
details.
Let z be the object function
z=[0 0 0 ... 1] [x1
                 x2
                 :
                 xn
                 c]
(loosely speaking, z = c)
subject to the linear constraint
[A]*[x] - [b] + c*[e] = 0
and the variable boundaries
    0 =< c =< 1
[x_min] =< [x] =< [x_max],
where ''A'' is a square matrix of n=2000x2000 elements, ''b'' is a vector
of 2000 elements, ''c'' is a constant (real number), "e" is a vector of
2000 elements, and "x" is a vector of 2000 elements (which is what I am
looking for!). I would like to know the sub-routine (or function) used to
find "x", considering that the matrix "A" is in text format (A.txt); on
the other hand, the vectors "b" and "e" are "b.txt" and "e.txt", while
''x_min'' and ''x_max'' are "x_min.txt" and "x_max.txt", in text format,
respectively. I believe this has been done already by you or somebody
else.

Thank you again everyone for your helping,

PhD student Ricardo Castro
University of Sao Paulo
Physics Intitute
Brazil