Re: [Help-glpk] GLPK Problem

[Ali Baharev]

Please try to compile and run. It turns out quickly if it has problems.

Why don't you try GNU Mathprog? For this pupose it could be better than C.

Good luck!

Ali

On 7/15/07, miguel montoya <address@hidden> wrote:
> Hello everybody, i want to solve the following problem
>
> Maximize Z=10x1+6x2+4x3
> Subject to
> x1+x2+x3+<=100
> 10x1+4x2+5x3<=600
> 2x1+2x2+6x3<=300
> 8x1+3x2+5x3=400
> 5x1+4x2+8x3=600
>
> where all variables are non-negative
>
> this is the routine in C
>
> LPX *lp
> int ia[1+1000], ja[1+1000];
> double ar[1+1000],Z,x1,x2,x3;
> lp=lpx_create_prob();
> lpx_set_obj_dir(lp,LPX_MAX),
> lpx_add_rows(lp,5);
> lpx_set_row_name(lp,1,"p");
> lpx_set_row_bnds(lp,1, LPX_UP , 0.0 , 100.0);
> lpx_set_row_name(lp,1,"q");
>  lpx_set_row_bnds(lp,1, LPX_UP , 0.0 , 600.0);
> lpx_set_row_name(lp,1,"r");
>  lpx_set_row_bnds(lp,1, LPX_UP , 0.0 , 300.0);
> lpx_set_row_name(lp,1,"s");
>  lpx_set_row_bnds(lp,1, LPX_FX , 0.0 , 400.0);
> lpx_set_row_name(lp,1,"t");
>  lpx_set_row_bnds(lp,1, LPX_FX , 0.0 , 600.0);
> lpx_add_cols(lp,3);
> lpx_set_col_name(lp,1,"x1");
> lpx_set_col_bnds(lp,1,LPX_LO, 0.0, 0.0);
> lpx_set_obj_coef(lp,1,10.0);
> lpx_set_col_name(lp,2,"x2");
>  lpx_set_col_bnds(lp,2,LPX_LO, 0.0, 0.0);
>  lpx_set_obj_coef(lp,1,6.0);
> lpx_set_col_name(lp,3,"x3");
>  lpx_set_col_bnds(lp,3,LPX_LO, 0.0, 0.0);
>  lpx_set_obj_coef(lp,3,4.0);
> ia[1]=1, ja=[1]=1, ar[1]=1.0;
> ia[2]=1, ja=[2]=2, ar[2]=1.0 ;
> ia[3]=1, ja=[3]=3, ar[3]=1.0 ;
> ......................................
> .....................................
> ......................................
> ........................................
> lpx_load_matrix(lp,12,ia,ja,ar);
>
> I want to know if the routine in C is right ????????????
>
> Thanks
>
> --
>
>
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