Scippy

SCIP

Solving Constraint Integer Programs

heur_shifting.h
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3/* This file is part of the program and library */
4/* SCIP --- Solving Constraint Integer Programs */
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24
25/**@file heur_shifting.h
26 * @ingroup PRIMALHEURISTICS
27 * @brief LP rounding heuristic that tries to recover from intermediate infeasibilities and shifts continuous variables
28 * @author Tobias Achterberg
29 *
30 * This heuristic is similar to the Rounding heuristic (see @ref heur_rounding.h), but it tries to continue in the case
31 * that no rounding can decrease the violation of a linear constraint. In this case, the value of a continuous variable
32 * or an integer variable with integral value will be shifted in order to decrease the violation of the constraint. To
33 * avoid cycling, the procedure terminates after a certain number of non-improving shifts.
34 */
35
36/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
37
38#ifndef __SCIP_HEUR_SHIFTING_H__
39#define __SCIP_HEUR_SHIFTING_H__
40
41#include "scip/def.h"
42#include "scip/type_retcode.h"
43#include "scip/type_scip.h"
44
45#ifdef __cplusplus
46extern "C" {
47#endif
48
49/** creates the shifting heuristic and includes it in SCIP
50 *
51 * @ingroup PrimalHeuristicIncludes
52 */
53SCIP_EXPORT
55 SCIP* scip /**< SCIP data structure */
56 );
57
58#ifdef __cplusplus
59}
60#endif
61
62#endif
common defines and data types used in all packages of SCIP
SCIP_RETCODE SCIPincludeHeurShifting(SCIP *scip)
type definitions for return codes for SCIP methods
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:63
type definitions for SCIP's main datastructure