//
//  Calculator.swift
//  Calculator
//
//  Copyright (c) 2017 Dwight Deugo. All rights reserved.
//

import Foundation

class Calculator: CustomStringConvertible {
    
    var accumulator: Float = 0.0
    var memory: Float = 0.0
    var description: String {
        return "Calculator accumulator \(accumulator)"
    }
    
    init()
    {
        accumulator = 0.0
    }

    func clear() {
        accumulator = 0
    }
    
    func add(_ amount: Float) -> Float {
        accumulator = accumulator + amount
        return accumulator
    }
    
    func subtract(_ amount: Float) -> Float {
        accumulator = accumulator - amount
        return accumulator
    }
    
    func multiply(_ amount: Float) -> Float {
        accumulator = accumulator * amount
        return accumulator
    }
    
    func divide(_ amount: Float) -> Float {
        accumulator = accumulator / amount
        return accumulator
    }
}