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

#define A_ROWS 50
#define A_COLS 100

typedef struct MY_REC
  {
    char name[32];
    int age;
    double income;
  } my_rec;

extern int errno;

#define assign_errno(x)   ((errno != 0) ? errno : (x))
                    

int main()
{ 
  int cc = 0;
  my_rec **arry2 = NULL; /* **arry2 is a pointer to a pointer */
  
/* First allocate an array of pointers for the ROWS */
  arry2 = (my_rec **) calloc((size_t) A_ROWS,sizeof(*arry2));
  if (arry2 != NULL)
    {
      /* Now for each row element we allocate A_COLS my_recs */
      int i = 0;

      while (i < A_ROWS && cc == 0)
        {
          arry2[i] = (my_rec *) calloc((size_t) A_COLS,sizeof(my_rec));
          if (arry2[i] != NULL) ++i;
          else
            {
              cc = assign_errno(-1);
              (void) fprintf(stderr,"Can't allocate columns (%d)\n",cc);
            }
        }
    }
  else
    {
      cc = assign_errno(-1);
      (void) fprintf(stderr,"Can't allocate rows (%d)\n",cc);
    }
  /* Now lets access those elements */
 if (cc == 0)
   {
     int i = 0,j = 0;

     while (i < A_ROWS)
       {
         j = 0;
         while (j < A_COLS)
           {
             (void) sprintf(arry2[i][j].name,"Row %3d Col %3d",i,j);
             arry2[i][j].age = i + j + 1;
             arry2[i][j].income = (double) (i + j + 1) * 1000.0;
             ++j;
           }
         ++i;
       }
     i = 0;
     while (i < A_ROWS)
       {
         j = 0;
         while (j < A_COLS)
           {
             (void) printf("Name: %s  Age: %5d  Income: %9.2lf\n",
                           arry2[i][j].name,arry2[i][j].age,
                           arry2[i][j].income);
             ++j;
           }
         ++i;
       }
   }
  return(cc);
}