import 'dart:io';
  
void main() {
  
  
Animal dolphin = Animal();
  dolphin.set_value(name:"Dolphin", age:2, placeOfOrigin:"Turkey");
  dolphin.display();
  
  Animal zebra = Animal();
  zebra.set_value(name:"Zebra", age:4, placeOfOrigin:"Egypt");
  zebra.display();
  
}

class Animal{
  int? age; 
  String? name;
  String? placeOfOrigin;
  void set_value({required int age,required String name,required String placeOfOrigin}){
    this.age= age;
    this.name= name;
    this.placeOfOrigin=placeOfOrigin;
  }
  
  void display(){ 
    print("The ${name} is ${age} years old and Place of Origin is ${placeOfOrigin}");}
  
}