Initializing help system before first use

# XSLPcalcslacks, XPRSnlpcalcslacks

Purpose
Calculate the slack values for the provided solution in the non-linear problem
Topic area
Solution
Synopsis
`int XPRS_CC XSLPcalcslacks(XSLPprob prob, const double[] solution, double[] slack);`
Arguments

prob | The current SLP problem.
solution | The solution for which the slacks are requested.
slack | Array of length ROWS to hold the slacks.

Related topics
XSLPvalidate, XSLPvalidaterow
Parent Topic Library functions and the programming interface

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