equ.nim

from strutils import replace, find, parseInt

echo "Input an operation:"

try:
  let
    line = stdin.readLine.replace(" ", "")
    opindex = line.find({'+','-','*','/'})

  if opindex == -1:
    raise newException(ValueError, "No known operand found")

  let
    op = line[opindex]
    arg1 = line[0..opindex-1].parseInt
    arg2 = line[opindex+1..^1].parseInt

    result = case op
      of '+': arg1 + arg2
      of '-': arg1 - arg2
      of '*': arg1 * arg2
      of '/': arg1 div arg2
      else: 0

  echo "Result = ", result
except:
  echo "An error occured: ", getCurrentExceptionMsg()