set_bounds_tighter

Specifies if set bounds may only be tighter or also less restrictive.

void set_bounds_tighter(lprec *lp, unsigned char tighten);

Return Value

set_bounds_tighter has no return value.

Parameters

Pointer to previously created lp model. See return value of make_lp, read_lp, read_LP, read_mps, read_freemps, read_MPS, read_freeMPS, read_XLI

tighten

Specifies if set bounds may only be tighter (TRUE) or also less restrictive (FALSE).

Remarks

The set_bounds_tighter function sets if bounds may only be tighter or also less restrictive. If set to TRUE then bounds may only be tighter. This means that when set_lowbo or set_lowbo is used to set a bound and the bound is less restrictive than an already set bound, then this new bound will be ignored. If tighten is set to FALSE, the new bound is accepted. This functionality is useful when several bounds are set on a variable and at the end you want the most restrictive ones. By default, this setting is FALSE. Note that this setting does not affect set_bounds.

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, 2);
  if(lp == NULL) {
    fprintf(stderr, "Unable to create new LP model\n");
    return(1);
  }

  set_bounds_tighter(lp, TRUE);

  delete_lp(lp);
  return(0);
}

lp_solve API reference