lp-solve.github.io/add_SOS.htm at main · lp-solve/lp-solve.github.io · GitHub

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					<h1>add_SOS</h1>
					<p>Add a SOS (Special Ordered Sets) constraint.</p>
					<p><b>int add_SOS(lprec </b>*<i>lp</i><b>, char </b>*<i>name</i><b>, int </b><i>sostype</i><b>, int </b><i>priority</i><b>, int </b><i>count</i><b>, int </b>*<i>sosvars</i><b>, REAL </b>*<i>weights</i><b>);</b></p>
					<p class="label"><b>Return Value</b></p>
					<p><b>add_SOS</b> returns the list index of the new SOS if the operation was successful. A return value
						of 0 indicates an error.
					</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>name</i></p>
					<p class="indent">The name of the SOS constraint.</p>
					<p class="dt"><i>sostype</i></p>
					<p class="indent">
						The type of the SOS constraint. Must be &gt;= 1</p>
					<p class="dt"><i>priority</i></p>
					<p class="indent">Priority of the SOS constraint in the SOS set.</p>
					<p class="dt"><i>count</i></p>
					<p class="indent">The number of variables in the SOS list.</p>
					<p class="dt"><i>sosvars</i></p>
					<p class="indent">An array specifying the <b>count</b> variables (their column
						numbers).</p>
					<p class="dt"><i>weights</i></p>
					<p class="indent">An array specifying the <b>count</b> variable weights. May also be NULL. In that case, lp_solve will weight the variables in the order they are specified.</p>
					<p class="label"><b>Remarks</b></p>
					<p>The <b>add_SOS</b> function adds an SOS constraint.<br>
					See <a href="SOS.htm">Special Ordered Sets</a> for a description about SOS variables.
					</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;
  int vars[2];
  double weights[2];

  /* Create a new LP model */
  lp = make_lp(0, 4);
  if(lp == NULL) {
    fprintf(stderr, "Unable to create new LP model\n");
    return(1);
  }

  vars[0] = 2; vars[1] = 3;
  weights[0] = 1.0; weights[1] = 2.0;
  add_SOS(lp, "SOS", 1, 1, sizeof(vars)/sizeof(*vars), vars, weights);

  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_SOS_var.htm">is_SOS_var</A></p>
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