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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html>
	<HEAD>
		<TITLE>get_constraints, get_ptr_constraints</TITLE>
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					<h1>get_constraints, get_ptr_constraints</h1>
					<p>Returns the values of the constraints.</p>
					<p><b>unsigned char get_constraints(lprec </b>*<i>lp</i><b>, REAL </b>*<i>constr</i><b>);</b></p>
					<p><b>unsigned char get_ptr_constraints(lprec </b>*<i>lp</i><b>, REAL </b>**<i>ptr_constr</i><b>);</b></p>
					<p class="label"><b>Return Value</b></p>
					<p><b>get_constraints, get_ptr_constraints</b> returns TRUE (1) if the operation
						was successful. A return value of FALSE (0) indicates an error.<br>
					</p>
					<p class="label"><b>Parameters</b></p>
					<p class="dt"><i>lp</i></p>
					<p class="indent">Pointer to previously created lp model. See return value of <A href="make_lp.htm">
							make_lp</A>, <A HREF="copy_lp.htm">copy_lp</A>, <A href="read_lp.htm">read_lp,
							read_LP</A>, <A href="read_mps.htm">read_mps, read_freemps, read_MPS, read_freeMPS</A>, <A HREF="read_XLI.htm">read_XLI</A></p>
					<p class="dt"><i>constr</i></p>
					<p class="indent">An array that will contain the values of the constraints.</p>
					<p class="dt"><i>ptr_constr</i></p>
					<p class="indent">The address of a pointer that will point to an array that will
						contain the values of the constraints.</p>
					<p class="label"><b>Remarks</b></p>
					<p>The <b>get_constraints</b>, <b>get_ptr_constraints</b> functions retrieve the
						values of the constraints.<br>
						These values are only valid after a successful <A href="solve.htm">solve</A> or
						<A href="lag_solve.htm">lag_solve</A>. Function <b>get_constraints</b> needs an
						array that is already dimensioned with <A href="get_Nrows.htm">get_Nrows</A> elements.
						<b>get_ptr_constraints</b> returns a pointer to an array already dimensioned by
						lp_solve. Element 0 will contain the value of the first row, element 1 of the
						second row, ...<br>
						Note that when <A href="set_presolve.htm">set_presolve</A> was called with parameter
						PRESOLVE_LINDEP that this can result in deletion of rows (the linear dependent ones).
						<b>get_constraints</b>, <b>get_ptr_constraints</b> will then
						return only the values of the rows that are kept and the values of the deleted rows
						are not known anymore.
					</p>
					<p>Note that <b>get_ptr_constraints</b> returns a pointer to memory allocated and maintained
					   by lp_solve. Be careful what you do with it. Don't modify its contents or free the memory.
					   Unexpected behaviour would occur. Also note that this memory pointer is only guaranteed to
					   remain constant until a next lp_solve API call is done. You should call this function again
					   to make sure you have again the correct pointer. Otherwise, this pointer could point to invalid
					   memory. This should not be a problem since this call is very efficient.</p>
					<p class="label"><b>Example</b></p>
					<pre><code>#include &lt;stdio.h&gt;
#include &lt;stdlib.h&gt;
#include "lp_lib.h"

int main(void)
{
  lprec *lp;
  REAL constr[2], *ptr_constr;

  /* Create a new LP model */
  lp = make_lp(2, 2);
  if(lp == NULL) {
    fprintf(stderr, "Unable to create new LP model\n");
    return(1);
  }

  solve(lp);

  get_constraints(lp, constr);
  get_ptr_constraints(lp, &amp;ptr_constr);

  delete_lp(lp);
  return(0);
}
</code></pre>
					<p>
						<A HREF="lp_solveAPIreference.htm">lp_solve API reference</A></p>
					<p>
						<b>See Also</b> <A HREF="make_lp.htm">make_lp</A>, <A HREF="copy_lp.htm">copy_lp</A>,
						<A href="read_lp.htm">read_lp, read_LP</A>, <A HREF="read_mps.htm">read_mps,
							read_freemps, read_MPS, read_freeMPS</A>, <A HREF="read_XLI.htm">read_XLI</A>, <a href="is_feasible.htm">is_feasible</a>, <A HREF="get_objective.htm">
							get_objective</A>, <A HREF="get_working_objective.htm">get_working_objective</A>, <a href="get_variables.htm">get_variables, get_ptr_variables</a>, <a href="get_primal_solution.htm">
							get_primal_solution, get_ptr_primal_solution, get_var_primalresult</a>, <A HREF="get_constr_value.htm">get_constr_value</A>,
						<a href="get_sensitivity_rhs.htm">get_sensitivity_rhs, get_ptr_sensitivity_rhs, get_dual_solution, get_ptr_dual_solution, get_var_dualresult</a>,
						<a href="get_sensitivity_obj.htm">get_sensitivity_obj, get_ptr_sensitivity_obj, get_sensitivity_objex, get_ptr_sensitivity_objex</a>,
					</p>
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