Just a tip: please read Sections 3.1 and 7.1 in MPG. It shows how to write normal C++ expressions for posting linear constraints.
Cheers Christian -- Christian Schulte, Professor of Computer Science, KTH, www.gecode.org/~schulte/ -----Original Message----- From: users-boun...@gecode.org [mailto:users-boun...@gecode.org] On Behalf Of Frederic C Sent: Monday, October 06, 2014 8:19 AM To: users@gecode.org Subject: Re: [gecode-users] First contact with gecode I changed IRT_LE for IRT_LQ and it works, thank you. I'm silly, if coefficients are all zeros, it helps if the right hand size can also be zero! Fred Le 06/10/2014 00:29, Chris Mears a écrit : > Hello Fred, > >> { // 1A + 1B > 0 >> IntArgs coeffs(2); coeffs[0] = 1; coeffs[1] = 1; >> linear(*this, coeffs, s, IRT_GT, int(0)); >> } > I am not sure how you got this to compile, because this should be > "IRT_GR". > >> { // 1A + 0B > 0 >> IntArgs coeffs(2); coeffs[0] = 1; coeffs[1] = 0; >> linear(*this, coeffs, s, IRT_GT, int(0)); >> } >> { // 1A + 1B > 0 >> IntArgs coeffs(2); coeffs[0] = 0; coeffs[1] = 1; >> linear(*this, coeffs, s, IRT_GT, int(0)); >> } >> { // 0A + 0B <= 0 >> IntArgs coeffs(2); coeffs[0] = 0; coeffs[1] = 0; >> linear(*this, coeffs, s, IRT_LE, int(0)); >> } > Here you want IRT_LQ ( <= ) instead of IRT_LE ( < ). _______________________________________________ Gecode users mailing list users@gecode.org https://www.gecode.org/mailman/listinfo/gecode-users _______________________________________________ Gecode users mailing list users@gecode.org https://www.gecode.org/mailman/listinfo/gecode-users
