[Fwd: GLPK usage for Eclipse C++ project]

[Andrew Makhorin]

-------- Forwarded Message --------
From: Mahmut Yavuzer <mahmut.yavuzer@karel.com.tr>
To: help-glpk@gnu.org <help-glpk@gnu.org>
Subject: GLPK usage for Eclipse C++ project
Date: Wed, 6 Jan 2021 14:31:28 +0000

Hi,
 
I have downloaded glpk-4.65 unpacked to the directory C:\progs\glpk-
4.65.
I have added environment variable C:\progs\glpk-4.65\w64.
 
 
I have also tried a Visual Studio project as explained on https://en.wik
ibooks.org/wiki/GLPK/Windows_executables#Building_a_C_program_using_the_
GLPK_library
 
I have tried the following code which is listed in the gmpl manuel. But
it is erroring as
 
“ Description      Resource             Location              Path      
Type
C:\workspace\ATM\Debug/../AtmOrnek.cpp:19: undefined reference to
`glp_set_prob_name'               ATM                                  
C/C++ Problem “
 
Similar error on visual studio.
 
I can run command “glpsol –model myModel.mod”.
 
Could you please provide installation manuel or step by step
instructions for Eclipse CDT IDE.
 
Thanks&Regards.
 
 
#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;
lp = glp_create_prob();
glp_set_prob_name(lp, "sample");
glp_set_obj_dir(lp, GLP_MAX);
glp_add_rows(lp, 3);
glp_set_row_name(lp, 1, "p");
glp_set_row_bnds(lp, 1, GLP_UP, 0.0, 100.0);
glp_set_row_name(lp, 2, "q");
glp_set_row_bnds(lp, 2, GLP_UP, 0.0, 600.0);
glp_set_row_name(lp, 3, "r");
glp_set_row_bnds(lp, 3, GLP_UP, 0.0, 300.0);
glp_add_cols(lp, 3);
glp_set_col_name(lp, 1, "x1");
glp_set_col_bnds(lp, 1, GLP_LO, 0.0, 0.0);
glp_set_obj_coef(lp, 1, 10.0);
glp_set_col_name(lp, 2, "x2");
glp_set_col_bnds(lp, 2, GLP_LO, 0.0, 0.0);
glp_set_obj_coef(lp, 2, 6.0);
glp_set_col_name(lp, 3, "x3");
glp_set_col_bnds(lp, 3, GLP_LO, 0.0, 0.0);
glp_set_obj_coef(lp, 3, 4.0);
ia[1] = 1, ja[1] = 1, ar[1] = 1.0; /* a[1,1] = 1 */
ia[2] = 1, ja[2] = 2, ar[2] = 1.0; /* a[1,2] = 1 */
ia[3] = 1, ja[3] = 3, ar[3] = 1.0; /* a[1,3] = 1 */
ia[4] = 2, ja[4] = 1, ar[4] = 10.0; /* a[2,1] = 10 */
ia[5] = 3, ja[5] = 1, ar[5] = 2.0; /* a[3,1] = 2 */
ia[6] = 2, ja[6] = 2, ar[6] = 4.0; /* a[2,2] = 4 */
ia[7] = 3, ja[7] = 2, ar[7] = 2.0; /* a[3,2] = 2 */
ia[8] = 2, ja[8] = 3, ar[8] = 5.0; /* a[2,3] = 5 */
ia[9] = 3, ja[9] = 3, ar[9] = 6.0; /* a[3,3] = 6 */
glp_load_matrix(lp, 9, ia, ja, ar);
glp_simplex(lp, NULL);
z = glp_get_obj_val(lp);
x1 = glp_get_col_prim(lp, 1);
x2 = glp_get_col_prim(lp, 2);
 
  x3 = glp_get_col_prim(lp, 3);
printf("\nz = %g; x1 = %g; x2 = %g; x3 = %g\n",
z, x1, x2, x3);
glp_delete_prob(lp);
return 0;
}
Mahmut Yavuzer
Uzman Mühendis



T +90 312 265 0290 / 6428
www.karel.com.tr

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