/* sample.c */

#include <stdio.h>

#include <stdlib.h>

#include <glpk.h>

int main(void)

{     glp_prob *lp;

      int ia[1+1000], ja[1+1000];

      double ar[1+1000], z, x1, x2, x3;

s1:   lp = glp_create_prob();

s2:   glp_set_prob_name(lp, "sample");

s3:   glp_set_obj_dir(lp, GLP_MAX);

s4:   glp_add_rows(lp, 3);

s5:   glp_set_row_name(lp, 1, "p");

s6:   glp_set_row_bnds(lp, 1, GLP_UP, 0.0, 100.0);

s7:   glp_set_row_name(lp, 2, "q");

s8:   glp_set_row_bnds(lp, 2, GLP_UP, 0.0, 600.0);

s9:   glp_set_row_name(lp, 3, "r");

s10:  glp_set_row_bnds(lp, 3, GLP_UP, 0.0, 300.0);

s11:  glp_add_cols(lp, 3);

s12:  glp_set_col_name(lp, 1, "x1");

s13:  glp_set_col_bnds(lp, 1, GLP_LO, 0.0, 0.0);

s14:  glp_set_obj_coef(lp, 1, 10.0);

s15:  glp_set_col_name(lp, 2, "x2");

s16:  glp_set_col_bnds(lp, 2, GLP_LO, 0.0, 0.0);

s17:  glp_set_obj_coef(lp, 2, 6.0);

s18:  glp_set_col_name(lp, 3, "x3");

s19:  glp_set_col_bnds(lp, 3, GLP_LO, 0.0, 0.0);

s20:  glp_set_obj_coef(lp, 3, 4.0);

s21:  ia[1] = 1, ja[1] = 1, ar[1] =  1.0; /* a[1,1] =  1 */

s22:  ia[2] = 1, ja[2] = 2, ar[2] =  1.0; /* a[1,2] =  1 */

s23:  ia[3] = 1, ja[3] = 3, ar[3] =  1.0; /* a[1,3] =  1 */

s24:  ia[4] = 2, ja[4] = 1, ar[4] = 10.0; /* a[2,1] = 10 */

s25:  ia[5] = 3, ja[5] = 1, ar[5] =  2.0; /* a[3,1] =  2 */

s26:  ia[6] = 2, ja[6] = 2, ar[6] =  4.0; /* a[2,2] =  4 */

s27:  ia[7] = 3, ja[7] = 2, ar[7] =  2.0; /* a[3,2] =  2 */

s28:  ia[8] = 2, ja[8] = 3, ar[8] =  5.0; /* a[2,3] =  5 */

s29:  ia[9] = 3, ja[9] = 3, ar[9] =  6.0; /* a[3,3] =  6 */

s30:  glp_load_matrix(lp, 9, ia, ja, ar);

s31:  glp_simplex(lp, NULL);

s32:  z = glp_get_obj_val(lp);

s33:  x1 = glp_get_col_prim(lp, 1);

s34:  x2 = glp_get_col_prim(lp, 2);

s35:  x3 = glp_get_col_prim(lp, 3);

s36:  printf("\nz = %g; x1 = %g; x2 = %g; x3 = %g\n",

         z, x1, x2, x3);

s37:  glp_delete_prob(lp);

      return 0;

}

/* eof */