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SCIP Doxygen Documentation: examples/Queens/src/queens.cpp Source File

29

: _scip(0), _n(n), _vars(n, vector<

SCIP_VAR

*>(n)), _cons()

47

ostringstream namebuf;

48 for

(

size_t

i = 0; i < _n; ++i )

50 for

(

size_t

j = 0; j < _n; ++j )

54

namebuf <<

"x#"

<< i <<

"#"

<< j;

57 SCIP_CALL_EXC

(

SCIPcreateVar

(_scip, & var, namebuf.str().c_str(), 0.0, 1.0, 1.0,

) );

69 for

(

size_t

i = 0; i < _n; ++i )

81 for

(

size_t

j = 0; j < _n; ++j )

88

_cons.push_back(cons);

92 for

(

size_t

j = 0; j < _n; ++j )

96

namebuf <<

"col_"

<< j;

100 for

(

size_t

i = 0; i < _n; ++i )

104

_cons.push_back(cons);

111 for

(

size_t

j = 0; j < _n; ++j )

115

namebuf <<

"diag_col_down_"

<< j;

119 for

(

size_t

i = 0; i < _n - j; ++i )

122

_cons.push_back(cons);

126 for

(

size_t

i = 0; i < _n; ++i )

130

namebuf<<

"diag_row_down_"

<<i;

134 for

(

size_t

j = 0; j < _n - i; ++j )

137

_cons.push_back(cons);

141 for

(

size_t

j = 0; j < _n; ++j )

145

namebuf<<

"diag_col_up_"

<<j;

149 for

(

size_t

i = 0; i < _n - j; ++i )

152

_cons.push_back(cons);

156 for

(

size_t

i = 0; i < _n; ++i )

160

namebuf<<

"diag_row_up"

<<i;

164 for

(

size_t

j = 0; j < _n - i; ++j )

167

_cons.push_back(cons);

177

out <<

"solution for "

<< _n <<

"-queens:"

<< endl << endl;

182

out <<

"no solution found"

<< endl;

186 for

(

size_t

i = 0; i < _n; ++i )

188 for

(

size_t

j = 0; j < _n; ++j )

192 for

(

size_t

j = 0; j < _n; ++j )

203 for

(

size_t

j = 0; j < _n; ++j)

215 for

(

size_t

i = 0; i < _n; ++i )

217 for

(

size_t

j = 0; j < _n; ++j )

223 for

( vector<SCIP_CONS *>::size_type i = 0; i < _cons.size(); ++i )

233

std::cerr <<

"SCIP Error: "

<< exp.

what

() << std::endl;

exception handling class for SCIP

const char * what(void) const

returns the error message

~QueensSolver()

destructor this is the place to release the SCIP_VAR and SCIP_CONS pointers and to free the SCIP poin...

void solve(void)

solves the queens problem using SCIPsolve

QueensSolver(size_t n=8)

constructs the BP model for the n-queens problem

void disp(std::ostream &out=std::cout)

display the solution

SCIP_RETCODE SCIPaddCoefLinear(SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Real val)

SCIP_RETCODE SCIPcreateConsLinear(SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Real *vals, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)

SCIP_RETCODE SCIPfree(SCIP **scip)

SCIP_RETCODE SCIPcreate(SCIP **scip)

SCIP_RETCODE SCIPaddVar(SCIP *scip, SCIP_VAR *var)

SCIP_RETCODE SCIPaddCons(SCIP *scip, SCIP_CONS *cons)

SCIP_RETCODE SCIPsetObjsense(SCIP *scip, SCIP_OBJSENSE objsense)

SCIP_RETCODE SCIPcreateProb(SCIP *scip, const char *name, SCIP_DECL_PROBDELORIG((*probdelorig)), SCIP_DECL_PROBTRANS((*probtrans)), SCIP_DECL_PROBDELTRANS((*probdeltrans)), SCIP_DECL_PROBINITSOL((*probinitsol)), SCIP_DECL_PROBEXITSOL((*probexitsol)), SCIP_DECL_PROBCOPY((*probcopy)), SCIP_PROBDATA *probdata)

SCIP_MESSAGEHDLR * SCIPgetMessagehdlr(SCIP *scip)

SCIP_RETCODE SCIPreleaseCons(SCIP *scip, SCIP_CONS **cons)

SCIP_SOL * SCIPgetBestSol(SCIP *scip)

SCIP_Real SCIPgetSolVal(SCIP *scip, SCIP_SOL *sol, SCIP_VAR *var)

SCIP_RETCODE SCIPsolve(SCIP *scip)

SCIP_RETCODE SCIPreleaseVar(SCIP *scip, SCIP_VAR **var)

SCIP_RETCODE SCIPcreateVar(SCIP *scip, SCIP_VAR **var, const char *name, SCIP_Real lb, SCIP_Real ub, SCIP_Real obj, SCIP_VARTYPE vartype, SCIP_Bool initial, SCIP_Bool removable, SCIP_DECL_VARDELORIG((*vardelorig)), SCIP_DECL_VARTRANS((*vartrans)), SCIP_DECL_VARDELTRANS((*vardeltrans)), SCIP_DECL_VARCOPY((*varcopy)), SCIP_VARDATA *vardata)

void SCIPmessagehdlrSetQuiet(SCIP_MESSAGEHDLR *messagehdlr, SCIP_Bool quiet)

public methods for message output

exception handling for SCIP

#define SCIP_CALL_EXC(x)

macro to call scip function with exception handling

SCIP_RETCODE SCIPincludeDefaultPlugins(SCIP *scip)

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