> I have some questions about GLPK through the API. > I have a variable like this : 2<=x<=5 ,through API, I write it > like this:
> glp_add_cols(lp,1); > glp_set_col_name(lp,1,"x"); > glp_set_col_bnds(lp,1,GLP_LO,2.0,0.0); > glp_set_col_bnds(lp,1,GLP_UP,0.0,5.0); > or like this: > glp_add_cols(lp,2); > glp_set_col_name(lp,1,"x"); > glp_set_col_name(lp,2,"x"); > glp_set_col_bnds(lp,1,GLP_LO,2.0,0.0); > glp_set_col_bnds(lp,2,GLP_UP,0.0,5.0); > which is right? Neither. You should write as follows: glp_set_col_bnds(lp, j, GLP_DB, 2., 5.); Every call to glp_set_col_bnds discards previously defined bounds of the variable. > i do not know add 1 cols or add 2 cols . One. _______________________________________________ Help-glpk mailing list Help-glpk@gnu.org http://lists.gnu.org/mailman/listinfo/help-glpk
