swift 在swift中实现整数结构

Posted 2021-05-19

struct Integerobj {
    var value:Int
    
    init(val:Int=0) {
        self.value = val
    }
    
    mutating func increment() {
        self.value++
    }
    
    mutating func decrement() {
        self.value--
    }
    
    mutating func add(other:Int) {
        self.value += other
    }
    
    mutating func subtract(other:Int) {
        self.value -= other
    }
}