[Help-glpk] [Fwd: GLPK Implementation help]

[Andrew Makhorin]

-------- Forwarded Message --------
From: João Guedes <address@hidden>
To: address@hidden
Subject: GLPK Implementation help
Date: Tue, 31 Jul 2012 11:57:28 +0100

hi,


I am João Guedes, master student of University of Minho, in Portugal. 
I'm developing a LP tool for my thesis, and dicide to use GLPK as my
solver, however i  am having some issues in the implementation
I'm using MS Visual Studio 2010, and in my project i include your lib,
and add your glpk.h to my addicionals c++ lib, but when i compile the
program i have a error on linker in all your funcions like this error
LNK2001: unresolved external symbol _glp_add_cols
Can you please help me?


The exemple that i'm trying to use is this:


#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;
}





-- 
Cumprimentos
João Guedes