import 'dart:io';
void main() {
Child c = new Child();
c.m1(12);
}
class Parent {
void m1(int a){ print("value of a ${a}");}
}
class Child extends Parent {
@override
void m1(String b) {
print("value of b ${b}");
}
}
原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/tech/pnotes/266201.html