int QSadd_rows (QSprob p, int num, int *rmatcnt, int *rmatbeg,
    int *rmatind, double *rmatval, double *rhs, char *sense,
    char **names)

/* Assume p is initialized to the problem in the QSload_prob example. */
/* Add two new rows to obtain the following LP.                       */
/*       Maximize  3.0x + 2.0y + 4.0z                                 */
/*       Subject to                                                   */
/*                 3.1x + 2.3y + 1.4z <= 12.2                         */
/*                 5.0x + 1.1y         = 10.0                         */
/*                 0.5x + 2.0y + 4.0z >=  6.0    New                  */
/*                        3.0y + 2.0z <=  8.0    New                  */
/*                 x >= 2.0                                           */
/*                 y free                                             */
/*                 1.0 <= z <= 10.0                                   */
/*                                                                    */

int rval;
int rmatcnt[2] = { 3, 2 };
int rmatbeg[2] = { 0, 3 };
int rmatind[5] = { 0, 1, 2, 1, 2 };
double rmatval[5] = { 0.5, 2.0, 4.0, 3.0, 2.0 };
double rhs[2] = { 6.0, 8.0 };
char sense[2] = { 'G', 'L' };

rval = QSadd_rows (p, 2, rmatcnt, rmatbeg, rmatind, rmatval, rhs,
                   sense, (char **) NULL);
if (rval) {
    fprintf (stderr, "Add rows failed, error code %d\n", rval);
} else {
    rval = QSwrite_prob (p, "new2small.lp", "LP");
    if (rval) {
        fprintf (stderr, "Could not write LP, error code %d\n", rval);
    }
}