Initializing help system before first use

# XPRSgetcallbackpresolveslacks

Purpose
Returns the slack values from the solution to the presolved problem associated with the current callback.
Topic areas
Solution, Callback
Synopsis
`int XPRS_CC XPRSgetcallbackpresolveslacks(XPRSprob prob, int *p_available, double slacks[], int first, int last);`
Arguments

prob | The current problem.
p_available | This variable will be set to 1 if a solution is available. May be NULL if not required.
slacks | Double array of length last-first+1 where the values of the slack variables will be returned. May be NULL if not required.
first | First row whose slack value to return.
last | Last row whose slack value to return.

Further information
1. Row indices should be in the range 0 to ROWS- 1.
2. See XPRSgetcallbacksolution for a list of callbacks where this function can be called.
Related topics
XPRSgetcallbackpresolvesolution, XPRSgetcallbackpresolveduals, XPRSgetcallbackpresolveredcosts, XPRSgetcallbackslacks, XPRSgetslacks.
Parent Topic Console and Library Functions

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