Initial commit

test/grammer/oop/03.dart

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+class Human {
+  String name = '';
+  double weight = 0;
+  double height = 0;
+
+  Human(this.name, this.weight, this.height);
+
+  String info() {
+    return "Human: name{${name},weight:${weight}kg,height:${height}cm}";
+  }
+}
+
+void main() {
+  Human toly = Human("捷特", 70, 180);
+  print(toly.info());
+
+  Human ls = Human("龙少", 65, 179);
+  print(ls.info());
+
+  Human wy = Human("巫缨", 65, 179);
+  print(wy.info());
+}
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