本文主要是创建了一个类，后续的很多例子都和本程序有关。
/*** You can edit, run, and share this code.* play.kotlinlang.org*/
fun main() {println("Hello, world!!!") val p=Person()p.name="Jack"p.age=19p.eat()
}
class Person{var name=""var age=0fun eat(){println(name+" is eating.He is "+age+" years old.")}
}运行结果：
Hello, world!!!
Jack is eating.He is 19 years old.
)
)