class Jdage():    
    def __init__(self,name,age):        
        self.name = name        
        self.age = age    
    def jd(self):        
        if self.age<18:            
            print(self.name+"还未成年。")        
        else:            
            print(self.name+"已成年")
my_stu = Jdage("Peter",26)
my_stu.jd()