Re: [Help-glpk] Need help using glpk API

[Andrew Makhorin]

> I have some problems concerning the use of glpk's API. I want to
> build a complex, mixed integer problem using glpk's API and I have
> already figured out how to add constraints and integer respective
> binary variables to the problem. What I need in addition is a way to
> add IF...THEN...ELSE constraints. Is there a way to add these
> constraints to a glpk program using glpk's api?

> If I understood the GMPL language reference right these
> constraints exists and could be used in conjunction with glpk. 

No, neither glpk nor the mathprog language support constraints like
if-then-else. However, if necessary, you can model such constraints
using standard techniques based on binary variables.