Initializing help system before first use

XPRSaddcbafterobjective

Purpose
Declares a callback which will be called after each objective in a multi-objective problem is solved.
Topic areas
Callback, Multiobjective
Synopsis
int XPRS_CC XPRSaddcbafterobjective (XPRSprob prob, void (XPRS_CC *afterobjective)(XPRSprob cbprob, void *cbdata), void *data, int priority);
Arguments
prob 
The current problem.
afterobjective 
The callback function itself. This takes two arguments, cbprob and cbdata. This function is called after every solve.
cbprob 
The problem passed to the callback function, afterobjective.
cbdata 
The user-defined data passed as data when setting up the callback with XPRSaddcbafterobjective.
data 
A user-defined data to be passed to the callback function, afterobjective.
priority 
An integer that determines the order in which multiple after-objective callbacks will be invoked. The callback added with a higher priority will be called before a callback with a lower priority. Set to 0 if not required.
Example
This example logs a message after each objective is solved: 
XPRSaddcbafterobjective(prob,afterobjective,NULL,0);
XPRSoptimize(prob,"",NULL,NULL);
The callback function might resemble: 
int XPRS_CC afterobjective(XPRSprob prob, void *data)
{
  int solvedobjs;
  XPRSgetintattribute(prob, XPRS_SOLVEDOBJS, &solvedobjs);
  printf("Completed solve %d\n", solvedObjs);
}
Further information
If the solve does not stop early, this callback will be invoked OBJSTOSOLVE times. Note that this can be less than than OBJECTIVES times, since all objectives with the same priority are combined into a single objective and solved at once.
Related topics
XPRSremovecbafterobjective, XPRSaddcbbeforeobjective.

Parent Topic Console and Library Functions

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