/* Code of Figure 14.5, page 634 from
   Kenneth C. Louden, Programming Languages
   Principles and Practice 2nd Edition
   Copyright (C) Brooks-Cole/ITP, 2003
   NOTE: the figure in the book is missing
   the entire main program
*/

#define SIZE 100
#define NUMPROCS 10
int a[SIZE] [SIZE], b[SIZE] [SIZE], c[SIZE] [SIZE];

void multiply(int myid)
{ int i, j, k;
  for (i = myid; i < SIZE; i+= NUMPROCS)
    for (j = 0; j < SIZE; ++j)
    { c[i][j] = 0;
      for (k = 0; k < SIZE; ++k)
        c[i][j] += a[i][k] * b[k][j];
    }
}

main()
{ int myid;
  /* code to input a,b goes here */
  for (myid = 0; myid < NUMPROCS; ++myid) 
    if (fork() == 0)
    { multiply(myid);
      exit(0);}
  for (myid = 0; myid < NUMPROCS; ++myid)
    wait(0);
  /* code to output c goes here */
  return 0;
}