Module: ppl/ppl Branch: sparse_matrices Commit: c82a27391846139072cadf0754f59f4805f4f99b URL: http://www.cs.unipr.it/git/gitweb.cgi?p=ppl/ppl.git;a=commit;h=c82a273918461...
Author: Enea Zaffanella zaffanella@cs.unipr.it Date: Sun Aug 29 11:01:58 2010 +0200
Do also read the inhomogeneous term of the objective function.
This should allow for a (almost) meaningful comparison with the optimizied value computed by glpk when using command line option -c.
Also corrected a minor bug in the output routine for the objective function (an open parenthesis was sometimes missing).
---
demos/ppl_lpsol/ppl_lpsol.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/demos/ppl_lpsol/ppl_lpsol.c b/demos/ppl_lpsol/ppl_lpsol.c index 3828f6e..fb44b4a 100644 --- a/demos/ppl_lpsol/ppl_lpsol.c +++ b/demos/ppl_lpsol/ppl_lpsol.c @@ -1172,7 +1172,12 @@ solve(char* file_name) {
/* Set the ppl_objective_le to be the objective function. */ ppl_new_Linear_Expression_with_dimension(&ppl_objective_le, dimension); - /* The inhomogeneous term is completely useless for our purpose. */ + /* Set value for objective function's inhomogeneous term. */ + mpz_mul(tmp_z, den_lcm, mpq_numref(objective[0])); + mpz_divexact(tmp_z, tmp_z, mpq_denref(objective[0])); + ppl_assign_Coefficient_from_mpz_t(ppl_coeff, tmp_z); + ppl_Linear_Expression_add_to_inhomogeneous(ppl_objective_le, ppl_coeff); + /* Set values for objective function's variable coefficients. */ for (i = 1; i <= dimension; ++i) { mpz_mul(tmp_z, den_lcm, mpq_numref(objective[i])); mpz_divexact(tmp_z, tmp_z, mpq_denref(objective[i])); @@ -1182,6 +1187,8 @@ solve(char* file_name) {
if (verbosity >= 4) { fprintf(output_file, "Objective function:\n"); + if (mpz_cmp_si(den_lcm, 1) != 0) + fprintf(output_file, "("); ppl_io_fprint_Linear_Expression(output_file, ppl_objective_le); }