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/* p is an initialized QSprob, a handle to an existing LP problem */
/* Find the index of the variable z. */
int rval, colindex;
const char *name = "z";
rval = QSget_column_index (p, name, &colindex);
if (rval) {
fprintf (stderr, "could not get index, error code %d\n", rval);
} else {
if (colindex == -1) {
printf ("%s is not in the problem\n", name);
} else {
printf ("%s is variable number %d\n", name, colindex);
}
}
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