Scippy

SCIP

Solving Constraint Integer Programs

heur_zeroobj.h
Go to the documentation of this file.
1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2 /* */
3 /* This file is part of the program and library */
4 /* SCIP --- Solving Constraint Integer Programs */
5 /* */
6 /* Copyright (C) 2002-2014 Konrad-Zuse-Zentrum */
7 /* fuer Informationstechnik Berlin */
8 /* */
9 /* SCIP is distributed under the terms of the ZIB Academic License. */
10 /* */
11 /* You should have received a copy of the ZIB Academic License */
12 /* along with SCIP; see the file COPYING. If not email to scip@zib.de. */
13 /* */
14 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
15 
16 /**@file heur_zeroobj.h
17  * @ingroup PRIMALHEURISTICS
18  * @brief heuristic that tries to solve the problem without objective. In Gurobi, this heuristic is known as "Hail Mary"
19  * @author Timo Berthold
20  */
21 
22 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
23 
24 #ifndef __SCIP_HEUR_ZEROOBJ_H__
25 #define __SCIP_HEUR_ZEROOBJ_H__
26 
27 
28 #include "scip/scip.h"
29 
30 #ifdef __cplusplus
31 extern "C" {
32 #endif
33 
34 /** main procedure of the zeroobj heuristic, creates and solves a sub-SCIP */
35 extern
37  SCIP* scip, /**< original SCIP data structure */
38  SCIP_HEUR* heur, /**< heuristic data structure */
39  SCIP_RESULT* result, /**< result data structure */
40  SCIP_Real minimprove, /**< factor by which zeroobj should at least improve the incumbent */
41  SCIP_Longint nnodes /**< node limit for the subproblem */
42  );
43 
44 /** creates the zeroobj primal heuristic and includes it in SCIP */
45 extern
47  SCIP* scip /**< SCIP data structure */
48  );
49 
50 #ifdef __cplusplus
51 }
52 #endif
53 
54 #endif
enum SCIP_Result SCIP_RESULT
Definition: type_result.h:51
struct SCIP_Heur SCIP_HEUR
Definition: type_heur.h:43
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:53
struct Scip SCIP
Definition: type_scip.h:30
SCIP_RETCODE SCIPincludeHeurZeroobj(SCIP *scip)
SCIP_RETCODE SCIPapplyZeroobj(SCIP *scip, SCIP_HEUR *heur, SCIP_RESULT *result, SCIP_Real minimprove, SCIP_Longint nnodes)
#define SCIP_Real
Definition: def.h:123
#define SCIP_Longint
Definition: def.h:107
SCIP callable library.