README.MD

Calculator ➕✖️➖➗

On your first day of class, you enter the halls, eager to embark on the journey of a lifetime. Little do you know that you have forgotten to bring one essential tool to class — a calculator. 😳

Your professor, a renowned expert in the community, begins the day's lesson by presenting a series of complex mathematical problems that require the use of a calculator. The students around you huddle together, pulling out their calculators to tackle the challenge. 💪

As you search your bag in vain for your calculator, you realize that you have inadvertently left it behind. Instead of panicking or admitting defeat, your resourceful nature kicks in. You decide to rely on your intelligence and aptitude in Motoko to create your own calculator. 🧑‍💻

🧑‍🏫 Requirements

Your task is to create the code for a calculator, which is implemented as a canister.
The canister should have a public interface that allows users to perform calculations. The canister has a memory variable called counter which represents the result of the most recent calculation.

📒 Steps

1. Define a mutable variable called counter of type Float to store the result of the most recent calculation.
2. Implement the add function, which accepts a value x of type Float, increments the counter, and returns its new value.

add : shared(x : Float) -> async Float;

3. Implement the sub function, which accepts a value x of type Float, decrements the counter, and returns its new value.

sub : shared(x : Float) -> async Float;

4. Implement the mul function, which accepts a value x of type Float, multiplies it with the counter, and returns the new value of the counter.

mul : shared(x : Float) -> async Float;

5. Implement the div function, which accepts a value x of type Float, divides the counter by x, and returns the new value of the counter. Ensure to guard against division by zero.

div : shared(x : Float) -> async ?Float;

6. Implement the reset function, which sets the value of counter to zero, effectively resetting it.

reset: shared () -> async ();

7. Implement the see function, which serves as a query and returns the current value of counter.

see: shared query () -> async Float;

8. Implement the power function, which accepts a value x of type Float, raises the counter to the power of x, and returns the new value of the counter.

power: shared (x : Float) -> async Float;

9. Implement the sqrt function, which calculates the square root of the counter and returns the new value of the counter.

sqrt: shared () -> async Float;

10. Implement the floor function, which returns the largest integer less than or equal to the counter.

floor: shared () -> async Int;

11. Deploy the Calculator on the Internet Computer.

📺 Interface

At the end of the project, your canister should implement the following interface.

actor {
    add : shared(x : Float) -> async Float;
    sub : shared(x : Float) -> async Float;
    mul : shared(x : Float) -> async Float;
    div : shared(x : Float) -> async ?Float;
    reset: shared () -> async ();
    see: shared query () -> async Float;
    power: shared (x : Float) -> async Float;
    sqrt: shared () -> async Float;
    floor: shared () -> async Int;
};