摘要： class Triangle{ int a = 10, b = 20, c = 25; int Zhouchang(){ return a + b + c; } double Area(){ double p = Zhouchang() / 2.0; return Math.sqrt(p * (p - a) * (p - b) * (p - c)); }}public class hello{ public static void main(String[] args){ Triangle a = new Triangle(); System.out.printf("%d\t%f.. 阅读全文