# SCIP

Solving Constraint Integer Programs

heur_fracdiving.h
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1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2 /* */
3 /* This file is part of the program and library */
4 /* SCIP --- Solving Constraint Integer Programs */
5 /* */
7 /* fuer Informationstechnik Berlin */
8 /* */
10 /* */
12 /* along with SCIP; see the file COPYING. If not visit scipopt.org. */
13 /* */
14 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
15
16 /**@file heur_fracdiving.h
17  * @ingroup PRIMALHEURISTICS
18  * @brief LP diving heuristic that chooses fixings w.r.t. the fractionalities
19  * @author Tobias Achterberg
20  *
21  * Diving heuristic: Iteratively fixes some fractional variable and resolves the LP-relaxation, thereby simulating a
22  * depth-first-search in the tree. Fractional Diving chooses the variable with the highest fractionality and rounds it to the
23  * nearest integer. One-level backtracking is applied: If the LP gets infeasible, the last fixing is undone, and the
24  * opposite fixing is tried. If this is infeasible, too, the procedure aborts.
25  */
26
27 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
28
29 #ifndef __SCIP_HEUR_FRACDIVING_H__
30 #define __SCIP_HEUR_FRACDIVING_H__
31
32 #include "scip/def.h"
33 #include "scip/type_retcode.h"
34 #include "scip/type_scip.h"
35
36 #ifdef __cplusplus
37 extern "C" {
38 #endif
39
40 /** creates the fracdiving heuristic and includes it in SCIP
41  *
42  * @ingroup PrimalHeuristicIncludes
43  */
46  SCIP* scip /**< SCIP data structure */
47  );
48
49 #ifdef __cplusplus
50 }
51 #endif
52
53 #endif
#define SCIP_EXPORT
Definition: def.h:100
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:54
type definitions for return codes for SCIP methods
type definitions for SCIP&#39;s main datastructure
SCIP_EXPORT SCIP_RETCODE SCIPincludeHeurFracdiving(SCIP *scip)
common defines and data types used in all packages of SCIP