/*
 * CS460: Operating Systems
 * Jim Plank
 * stuff.c -- producer/consumer read/write/print routines
 */

#include <stdio.h>

struct inputstruct {
  char s[2000];
};

struct outputstruct {
  int sum;
};

struct inputstruct *read_input()
{
  struct inputstruct *is;

  is = (struct inputstruct *) malloc(sizeof(struct inputstruct));
  if (gets(is->s) == NULL) {
    free(is);
    return NULL;
  } else {
    return is;
  }
}

struct outputstruct *process_input(is)
struct inputstruct *is;
{
  struct outputstruct *os;
  int i1, i2, i3, i4;

  i1 = 0;
  i2 = 0;
  i3 = 0;
  i4 = 0;
  
  os = (struct outputstruct *) malloc(sizeof(struct outputstruct));

  sscanf(is->s, "%d %d %d %d", &i1, &i2, &i3, &i4);
  os->sum = i1+i2+i3+i4;
  free(is);
  return os;
}

print_output(os)
struct outputstruct *os;
{
  printf("Sum: %d\n", os->sum);
  free(os);
}