# set_preferdual Sets the desired combination of primal and dual simplex algorithms. void set_preferdual(lprec *lp, unsigned char dodual); Return Value set_preferdual has no return value. Parameters lp Pointer to previously created lp model. See return value of make_lp, copy_lp, read_lp, read_LP, read_mps, read_freemps, read_MPS, read_freeMPS, read_XLI dodual When TRUE, the simplex strategy is set to SIMPLEX_DUAL_DUAL. When FALSE, the simplex strategy is set to SIMPLEX_PRIMAL_PRIMAL. See also get_simplextype Remarks The set_preferdual function sets the desired combination of primal and dual simplex algorithms. set_preferdual with dodual = TRUE is a shortcut for set_simplextype(SIMPLEX_DUAL_DUAL) set_preferdual with dodual = FALSE is a shortcut for set_simplextype(SIMPLEX_PRIMAL_PRIMAL) The default is SIMPLEX_DUAL_PRIMAL (6). Example
    #include <stdio.h>
    #include <stdlib.h>
    #include "lp_lib.h"

    int main(void)
    {
      lprec *lp;

      /* Create a new LP model */
      lp = make_lp(0, 0);
      if(lp == NULL) {
        fprintf(stderr, "Unable to create new LP model\n");
        return(1);
      }

      set_preferdual(lp, TRUE);

      delete_lp(lp);
      return(0);
    }
lp_solve API reference See Also make_lp, copy_lp, read_lp, read_LP, read_mps, read_freemps, read_MPS, read_freeMPS, read_XLI, get_simplextype