Purpose
Set a user callback to be called during MISLP when an integer solution is obtained
Synopsis
int XPRS_CC XSLPsetcbintsol(XSLPprob Prob,
int (XPRS_CC *UserFunc) (XSLPprob myProb, void *myObject),
void *Object);
Arguments
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Prob
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The current SLP problem.
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UserFunc
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The function to be called when an integer solution is obtained.
UserFunc returns an integer value.
At present, the return value is ignored.
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myProb
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The problem passed to the callback function.
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myObject
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The user-defined object passed as Object to
XSLPsetcbintsol.
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Object
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Address of a user-defined object, which can be used for any purpose
by the function. Object is passed to UserFunc as myObject.
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Example
The following example sets up a callback to be executed whenever an integer
solution is found during MISLP:
double *cSol;
XSLPsetcbintsol(Prob, CBIntSol, &cSol);
The following sample callback function saves the solution values for the
integer solution just found:
int XPRS_CC CBIntSol(XSLPprob MyProb, void *Obj) {
XPRSprob xprob;
double *cSol;
cSol = * (double **) Obj;
XSLPgetptrattrib(MyProb, XSLP_XPRSPROBLEM, &xprob);
XPRSgetsol(xprob, cSol, NULL, NULL, NULL);
return 0;
}The Object argument is used here to hold the address of the array cSol
which we assume was assigned using one of the malloc functions.
Further information
This callback must be used during MISLP instead of the
XPRSsetcbintsol callback which is used for MIP problems.
When used with VB, the callback function has the prototype:
Public Function mycbfunc (ByVal prob As Long, ByVal object As Long) As Long
Related topics
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