#define MSIZE 10
#define EMPTY 0

// Think of the above as if they were in memsim-decl.c and said:
// const int MSIZE = 10;
// const int EMPTY = 0;
// For technical reasons, that doesn't work in C when we need to
// use them in initializers for memory[] and free_list in memsim-decl.c,
// so we must use the preprocessor commands instead.
  
// MSIZE is set artificially low to facilitate "out of memory" testing.
// This may be changed.

extern int next_mem;
extern int memory[];
extern int free_list;