| get_NcolumnsReturns the number of columns (variables) in the lp. int get_Ncolumns(lprec *lp); Return Value get_Ncolumns returns the number of columns (variables) in the lp.
 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 Remarks The get_Ncolumns function returns the number of columns (variables) in the lp.Note that the number of columns can change when a presolve is done or when
						negative variables are split in a positive and a negative part.
 Therefore it is advisable to use this function to determine how many columns
						there are in the lp instead of relying on an own count.
 Example #include <stdio.h>
#include <stdlib.h>
#include "lp_lib.h"
int main(void)
{
  lprec *lp;
  int Ncolumns;
  /* Create a new LP model */
  lp = make_lp(0, 1);
  if(lp == NULL) {
    fprintf(stderr, "Unable to create new LP model\n");
    return(1);
  }
  Ncolumns = get_Ncolumns(lp); /* Will return 1 */
  set_presolve(lp, PRESOLVE_COLS);
  solve(lp);
  Ncolumns = get_Ncolumns(lp); /* Will return 0 */
  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_Norig_columns, get_Nrows, get_Norig_rows, get_orig_index, get_lp_index, get_Lrows |