# variables are always references
#   read their address with their names: x (can't write to their address)
#   read/write their contents with a lookup: *x
var x : char

fn main [
  call read 0/stdin, x, 1/size  # watch out; reading a global may not be possible in all instructions
                                # but the address is more easily obtained
  result/EAX <- call write 1/stdout, x, 1/size
  call exit, result/EAX
]

fn exit x : int [
  code/EBX <- copy x
  code/EAX <- copy 1/exit
  syscall
]