set_constr_type

Set the type of a constraint.

int set_constr_type(lprec *lp, int row, short constr_type);

Return Value

set_constr_type returns TRUE (1) if the operation was successful. A return value of FALSE (0) indicates an error.

Parameters

Pointer to previously created lp model. See return value of make_lp, copy_lp, read_lp, read_lp_file, read_LP, read_mps, read_MPS

row

The row for which the constraint type must be set. Must be between 1 and number of rows in the lp.

constr_type

The type of the constraint. Can by any of the following values:

LE (0)	Less than or equal (<=)
EQ (1)	Equal (=)
GE (2)	Greater than or equal (>=)

Remarks

The set_constr_type function sets the constraint type for the specified row.
The default constraint type is LE (0).

Example

#include <stdio.h>
#include <stdlib.h>
#include "lpkit.h"

int main(void)
{
  lprec *lp;

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

  set_constr_type(lp, 1, GE);

  delete_lp(lp);
  return(0);
}

lp_solve API reference