public/subjects/java/checkpoints/do-operation/README.md

DoOperation

Instructions

In a file named DoOperation.java write a function operate that returns the result of the given arithmetic operation specified in the parameters. The arguments should be passed in the following order:

• The first argument is the left operand
• The second argument is the operation sign
• The third argument is the right operand

Expected Functions

public class DoOperation {
    public static String operate(String[] args) {
        // your code here
    }
}

Usage

Here is a possible ExerciseRunner.java to test your function :

public class ExerciseRunner {
    public static void main(String[] args) {
        System.out.println(DoOperation.operate(new String[]{"1","+","2"}));
        System.out.println(DoOperation.operate(new String[]{"1","-","1"}));
        System.out.println(DoOperation.operate(new String[]{"1","%","0"}));
        System.out.println(DoOperation.operate(args));
    }
}

and its output :

$ javac *.java -d build
$ java -cp build ExerciseRunner
3
0
Error
it depend on the input.
$