int QSget_column_index (QSprob p, const char *name, int *colindex)
/* 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); } }