int QSget_intcount (QSprob p, int *count)

This function can be used to obtain the number of integer variables in the problem, that is, the number of variables that are required to take on integer values.

/* p is an initialized QSprob, a handle to an existing LP problem  */

int rval, count;

rval = QSget_intcount (p, &count);
if (rval) {
    fprintf (stderr, 
             "could not get integer count, error code %d\n", rval);
} else {
    printf ("Problem has %d integer variables\n", count);
}