source: glpk-cmake/examples/netgen.c

/* netgen.c */

/* This main program generates 50 original NETGEN instances of the
   minimum cost flow problem and writes them in DIMACS format to the
   current directory. */

#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <glpk.h>

static int parm[50][15] =
{    {13502460, 101,
      5000, 2500, 2500, 25000, 1, 100, 250000, 0, 0, 0, 100, 1, 1000,
   },{4281922, 102,
      5000, 2500, 2500, 25000, 1, 100, 2500000, 0, 0, 0, 100, 1, 1000,
   },{44820113, 103,
      5000, 2500, 2500, 25000, 1, 100, 6250000, 0, 0, 0, 100, 1, 1000,
   },{13450451, 104,
      5000, 2500, 2500, 25000, -100, -1, 250000, 0, 0, 0, 100, 1, 1000,
   },{14719436, 105,
      5000, 2500, 2500, 25000, 101, 200, 250000, 0, 0, 0, 100, 1, 1000,
   },{17365786, 106,
      5000, 2500, 2500, 12500, 1, 100, 125000, 0, 0, 0, 100, 1, 1000,
   },{19540113, 107,
      5000, 2500, 2500, 37500, 1, 100, 375000, 0, 0, 0, 100, 1, 1000,
   },{19560313, 108,
      5000, 2500, 2500, 50000, 1, 100, 500000, 0, 0, 0, 100, 1, 1000,
   },{2403509, 109,
      5000, 2500, 2500, 75000, 1, 100, 750000, 0, 0, 0, 100, 1, 1000,
   },{92480414, 110,
      5000, 2500, 2500, 12500, 1, 100, 250000, 0, 0, 0, 100, 1, 1000,
   },{4230140, 111,
      5000, 2500, 2500, 37500, 1, 100, 250000, 0, 0, 0, 100, 1, 1000,
   },{10032490, 112,
      5000, 2500, 2500, 50000, 1, 100, 250000, 0, 0, 0, 100, 1, 1000,
   },{17307474, 113,
      5000, 2500, 2500, 75000, 1, 100, 250000, 0, 0, 0, 100, 1, 1000,
   },{4925114, 114,
      5000, 500, 4500, 25000, 1, 100, 250000, 0, 0, 0, 100, 1, 1000,
   },{19842704, 115,
      5000, 1500, 3500, 25000, 1, 100, 250000, 0, 0, 0, 100, 1, 1000,
   },{88392060, 116,
      5000, 2500, 2500, 25000, 1, 100, 250000, 0, 0, 0, 0, 1, 1000,
   },{12904407, 117,
      5000, 2500, 2500, 12500, 1, 100, 125000, 0, 0, 0, 0, 1, 1000,
   },{11811811, 118,
      5000, 2500, 2500, 37500, 1, 100, 375000, 0, 0, 0, 0, 1, 1000,
   },{90023593, 119,
      5000, 2500, 2500, 50000, 1, 100, 500000, 0, 0, 0, 0, 1, 1000,
   },{93028922, 120,
      5000, 2500, 2500, 75000, 1, 100, 750000, 0, 0, 0, 0, 1, 1000,
   },{72707401, 121,
      5000, 50, 50, 25000, 1, 100, 250000, 50, 50, 0, 100, 1, 1000,
   },{93040771, 122,
      5000, 250, 250, 25000, 1, 100, 250000, 250, 250, 0, 100, 1, 1000,
   },{70220611, 123,
      5000, 500, 500, 25000, 1, 100, 250000, 500, 500, 0, 100, 1, 1000,
   },{52774811, 124,
      5000, 1000, 1000, 25000, 1, 100, 250000, 1000, 1000, 0, 100, 1,
      1000,
   },{22492311, 125,
      5000, 1500, 1500, 25000, 1, 100, 250000, 1500, 1500, 0, 100, 1,
      1000,
   },{35269337, 126,
      5000, 500, 500, 12500, 1, 100, 125000, 500, 500, 0, 100, 1, 1000,
   },{30140502, 127,
      5000, 500, 500, 37500, 1, 100, 375000, 500, 500, 0, 100, 1, 1000,
   },{49205455, 128,
      5000, 500, 500, 50000, 1, 100, 500000, 500, 500, 0, 100, 1, 1000,
   },{42958341, 129,
      5000, 500, 500, 75000, 1, 100, 750000, 500, 500, 0, 100, 1, 1000,
   },{25440925, 130,
      5000, 500, 500, 12500, 1, 100, 250000, 500, 500, 0, 100, 1, 1000,
   },{75294924, 131,
      5000, 500, 500, 37500, 1, 100, 250000, 500, 500, 0, 100, 1, 1000,
   },{4463965, 132,
      5000, 500, 500, 50000, 1, 100, 250000, 500, 500, 0, 100, 1, 1000,
   },{13390427, 133,
      5000, 500, 500, 75000, 1, 100, 250000, 500, 500, 0, 100, 1, 1000,
   },{95250971, 134,
      1000, 500, 500, 25000, 1, 100, 250000, 500, 500, 0, 100, 1, 1000,
   },{54830522, 135,
      2500, 500, 500, 25000, 1, 100, 250000, 500, 500, 0, 100, 1, 1000,
   },{520593, 136,
      7500, 500, 500, 25000, 1, 100, 250000, 500, 500, 0, 100, 1, 1000,
   },{52900925, 137,
      10000, 500, 500, 25000, 1, 100, 250000, 500, 500, 0, 100, 1, 1000,
   },{22603395, 138,
      5000, 500, 500, 25000, 1, 100, 250000, 500, 500, 0, 100, 1, 50,
   },{55253099, 139,
      5000, 500, 500, 25000, 1, 100, 250000, 500, 500, 0, 100, 1, 250,
   },{75357001, 140,
      5000, 500, 500, 25000, 1, 100, 250000, 500, 500, 0, 100, 1, 500,
   },{10072459, 141,
      5000, 500, 500, 25000, 1, 100, 250000, 500, 500, 0, 100, 1, 2500,
   },{55728492, 142,
      5000, 500, 500, 25000, 1, 100, 250000, 500, 500, 0, 100, 1, 5000,
   },{593043, 143,
      5000, 500, 500, 25000, 1, 100, 250000, 500, 500, 0, 0, 1, 1000,
   },{94236572, 144,
      5000, 500, 500, 25000, 1, 10, 250000, 500, 500, 0, 100, 1, 1000,
   },{94882955, 145,
      5000, 500, 500, 25000, 1, 1000, 250000, 500, 500, 0, 100, 1, 1000,
   },{48489922, 146,
      5000, 500, 500, 25000, 1, 10000, 250000, 500, 500, 0, 100, 1,
      1000,
   },{75578374, 147,
      5000, 500, 500, 25000, -100, -1, 250000, 500, 500, 0, 100, 1,
      1000,
   },{44821152, 148,
      5000, 500, 500, 25000, -50, 49, 250000, 500, 500, 0, 100, 1, 1000,
   },{45224103, 149,
      5000, 500, 500, 25000, 101, 200, 250000, 500, 500, 0, 100, 1,
      1000,
   },{63491741, 150,
      5000, 500, 500, 25000, 1001, 1100, 250000, 500, 500, 0, 100, 1,
      1000,
   }
};

typedef struct { double rhs; } v_data;
typedef struct { double cap, cost; } a_data;

int main(void)
{     glp_graph *G;
      int k;
      char fname[100+1];
      G = glp_create_graph(sizeof(v_data), sizeof(a_data));
      for (k = 1; k <= 50; k++)
      {  sprintf(fname, "netgn%03d.min", parm[k-1][1]);
         glp_netgen(G, offsetof(v_data, rhs), offsetof(a_data, cap),
            offsetof(a_data, cost), &parm[k-1][-1]);
         glp_write_mincost(G, offsetof(v_data, rhs), -1,
            offsetof(a_data, cap), offsetof(a_data, cost), fname);
      }
      glp_delete_graph(G);
      return 0;
}

/* eof */