上机实验报告源代码

class People{ protected double weight,height; public void speakHello() } public void __era

class People {protected double weight,height; public void speakHello() } public void __erageHeight() {height=173; } public void __erageWeight() {weight=70; } } class ChinaPeople extends People {public void speakHello() } public void __erageHeight() {height=173.0; } public void __erageWeight() {weight=67.34; } public void chinaGongfu() } } class AmericanPeople extends People {public void speakHello() } public void __erageHeight() {height=188.0; } public void __erageWeight() {weight=80.23; } public void americanBoxing()