> My code is as follows. Can somebody pls help me pointing out the problem.
> int main()
> {
> glp_prob *lp;
> int ia[1+1000], ja[1+1000];
> double ar[1+1000];
> int x1, x2, x3,x4;
> ;
>
> outfile = fopen("lpout.out","w");
> float cur1, cur2, cur3, cur4;
> float bound_p, bound_q, bound_r;
>
>
> glp_iocp parm;
> glp_smcp simplex_parm;
> int ret;
>
>
> /*10.00x1 + (-1.00)x2 < 5.00
> 1.00x2 and +(-2.00)x3 < 5.00
> 2.00x3 + (-0.50)x4 < 5.00
> */
> lp = glp_create_prob();
> glp_set_prob_name(lp, "sample");
> glp_set_obj_dir(lp, GLP_MAX);
>
>
> glp_add_rows(lp, 4);
>
> bound_p = 5 ;
> bound_q = 5;
> bound_r = 5 ;
>
> fprintf(outfile, "bound_p = %.2f bound_q %.2f bound_r = %.2f \n ", bound_p, bound_q, bound_r);
>
> glp_set_row_name(lp, 1, "p");
> glp_set_row_bnds(lp, 1, GLP_UP, -DBL_MAX, bound_p);
> glp_set_row_name(lp, 2, "q");
> glp_set_row_bnds(lp, 2, GLP_UP, -DBL_MAX, bound_q);
> glp_set_row_name(lp, 3, "r");
> glp_set_row_bnds(lp, 3, GLP_UP, -DBL_MAX, bound_r);
>
> glp_set_row_name(lp, 4, "o");
> glp_set_row_bnds(lp, 4, GLP_FX, 1, 1);
>
> glp_add_cols(lp, 4);
> glp_set_col_name(lp, 1, "x1");
> glp_set_col_bnds(lp, 1, GLP_DB, 0, 1);
> glp_set_col_kind(lp, 1, GLP_IV);
>
> glp_set_col_name(lp, 2, "x2");
> glp_set_col_bnds(lp, 2, GLP_DB, 0, 1);
> glp_set_col_kind(lp, 2, GLP_IV);
>
> glp_set_col_name(lp, 3, "x3");
> glp_set_col_bnds(lp, 3, GLP_DB, 0, 1);
> glp_set_col_kind(lp, 3, GLP_IV);
>
> glp_set_col_name(lp, 4, "x4");
> glp_set_col_bnds(lp, 4, GLP_DB, 0, 1);
> glp_set_col_kind(lp, 4, GLP_IV);
>
>
>
> ia[1] = 2, ja[1] = 1, ar[1] = 10.0;
> ia[2] = 2, ja[2] = 2, ar[2] = -1.0;
> ia[3] = 2, ja[3] = 3, ar[3] = 0.0;
> ia[4] = 2, ja[4] = 4, ar[4] = 0.0;
>
>
>
>
> ia[5] = 3, ja[5] = 1, ar[5] = 0.0;
> ia[6] = 3, ja[6] = 2, ar[6] = 1.0;
> ia[7] = 3, ja[7] = 3, ar[7] = -2.0;
> ia[8] = 3, ja[8] = 4, ar[8] = 0.0;
>
>
> ia[9] = 4, ja[9] = 1, ar[9] = 0.0;
> ia[10] = 4, ja[10] = 2, ar[10] = 0.0;
> ia[11] = 4, ja[11] = 3, ar[11] = 2.0;
> ia[12] = 4, ja[12] = 4, ar[12] = -0.5;
>
> fprintf(outfile, "x1 + x2 +x3 +x4 = 1 \n");
> /*x1 + x2+ x3 + x4 = o */
> ia[13] = 1, ja[13] = 1, ar[13] = 1;
> ia[14] = 1, ja[14] = 2, ar[14] = 1;
> ia[15] = 1, ja[15] = 3, ar[15] = 1;
> ia[16] = 1, ja[16] = 4, ar[16] = 1;
>
> glp_load_matrix(lp, 16, ia, ja, ar);
>
> glp_init_smcp( simplex_parm);
> simplex_parm.presolve = GLP_OFF;
>
> if(glp_simplex(lp, simplex_parm) != 0)
> {
> printf("failure of simplex\n");
> exit(-1);
> }
>
> x1 = glp_get_col_prim(lp, 1);
> x2 = glp_get_col_prim(lp, 2);
> x3 = glp_get_col_prim(lp, 3);
> x4 = glp_get_col_prim(lp, 4);
>
> fprintf(outfile,"\n x1 = %d; x2 = %d; x3 = %d x4 = %d \n", x1, x2, x3, x4);
>
> glp_delete_prob(lp);
> return 0;
> }
> The terminal output is
> " 0: objval = 0.000000000e+00 infeas = 1.000000000e+00 (0)
> 1: objval = 0.000000000e+00 infeas = 0.000000000e+00 (0)
> OPTIMAL SOLUTION FOUND"
> Thanks,
> satish
Looks like you missed the very first constraint.