题解 | #修改属性1#

class employee:
    def __init__(self,name,salary,age=-1):
        self.name=name
        self.salary=salary
        self.age=age
    def printclass(self):
        if self.age==-1:
            print("Error! No age")
        else:
            print("{}'salary is {}, and his age is {}".format(self.name,self.salary,self.age))
a=input()
b=int(input())
c=int(input())
e=employee(a,b)
e.printclass()
e.age=c 
e.printclass()