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<h1>get_nameindex</h1>
<p>Gets the index of a given column or row name in the lp.</p>
<p><b>int get_nameindex(lprec </b>*<i>lp</i><b>, char </b>*<i>name</i><b>, unsigned char </b><i>isrow</i><b>);</b></p>
<p class="label"><b>Return Value</b></p>
<p><b>get_nameindex</b> returns the index (column/row number) of the given column/row name.
A return value of -1 indicates that the name does not exist.
Note that the index is the original index number. So if presolve is active, it has no effect.
It is the original column/row number that is returned.
</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 column or row for which the index (column/row number) must be retrieved.</p>
<p class="dt"><i>isrow</i></p>
<p class="indent">Set to FALSE (0) if column information is needed and TRUE (1) if row information is needed.</p>
<p class="label"><b>Remarks</b></p>
<p>The <b>get_nameindex</b> function returns the index (column/row number) of the given column/row name.
Note that this index starts from 1. Some API routines expect zero-based indexes and thus this value must then be corrected with -1.<br>
This routine is new from version 5.1.1.1.
</p>
<p class="label"><b>Example</b></p>
<pre><code>#include <stdio.h>
#include <stdlib.h>
#include "lp_lib.h"
int main(void)
{
lprec *lp;
int column;
/* Create a new LP model */
lp = make_lp(1, 0);
if(lp == NULL) {
fprintf(stderr, "Unable to create new LP model\n");
return(1);
}
set_row_name(lp, 1, "col1");
column = get_nameindex(lp, "col1", TRUE); /* will return 1 */
column = get_nameindex(lp, "col", TRUE); /* will return -1 */
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="set_row_name.htm">set_row_name</A>, <A HREF="get_row_name.htm">get_row_name, get_origrow_name</A>, <A HREF="set_col_name.htm">
set_col_name</A>, <A HREF="get_col_name.htm">get_col_name, get_origcol_name</A></p>
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