enumcalculator

enumcalculator

enum Operand: String {
    case addition = "+"
    case subtraction = "-"
    case multiplication = "*"
    case division = "/"
}

func operation (operand: Operand) -> ((Int, Int) -> Int) {
    func addition (a: Int, b: Int) -> Int {
        return a + b
    }
    func subtraction (a: Int, b: Int) -> Int {
        return a - b
    }
    func multiplication (a: Int, b: Int) -> Int {
        return a * b
    }
    func division (a: Int, b: Int) -> Int {
        return a / b
    }
    switch operand {
    case .addition:
        return addition
    case .subtraction:
        return subtraction
    case .multiplication:
        return multiplication
    case .division:
        return division
    }
}

var function = operation(operand: Operand.addition)
print("1 + 2 = \(function(1,2))")