Swift Learning notes-the computed properties of a class

1,swift classes can use computed properties, that is, use get and set to indirectly get/change the values of other properties, as shown in the code

classcalcuator{varA:int =1; varB:int =1; varsum:int{Get{            returnA +B}Set(val) {b= Val-a}}}let cal=calcuator ();p rint (cal.sum)//2Cal.sum =5print (cal.b)//4

2, for the set has a shorthand method, shorthand, the newly assigned value defaults to NewValue

class calcuator{    var1;     var 1 ;      var sum:int{        get{            return A + b        }        set  {            = newvalue- a        }}    }

3, if only get, do not set the method can be simply written as follows code

class calcuator{    var1;     var 1 ;      var sum:int{        return A + b    }}

Swift Learning notes-the computed properties of a class