public/subjects/doop

doop

Instructions

Write a program that is called doop.

The program has to be used with three arguments:

• A value
• An operator, one of : +, -, /, *, %
• Another value

In case of an invalid operator, value, number of arguments or an overflow, the programs prints nothing.

The program has to handle the modulo and division operations by 0 as shown on the output examples below.

Usage

$ go run .
$ go run . 1 + 1 | cat -e
2
$
$ go run . hello + 1
$ go run . 1 p 1
$ go run . 1 / 0 | cat -e
No division by 0
$
$ go run . 1 % 0 | cat -e
No modulo by 0
$
$ go run . 9223372036854775807 + 1
$ go run . -9223372036854775809 - 3
$ go run . 9223372036854775807 "*" 3
$ go run . 1 "*" 1
1
$ go run . 1 "*" -1
-1
$

Notions

• Numeric Types
• Arithmetic Operators