TQC+ JAVA

JPA01.java

import java.util.Scanner;
public class JPA01 {
    public static void main(String args[]) {
        double totalarea;
        System.out.printf("圓形面積為：%f \n", calCircle(5));
        System.out.printf("三角形面積為：%f \n", calTriangle(10, 5));
        System.out.printf("方形面積為：%f \n", calRectangle(5, 10));
        totalarea = calCircle(5) + calTriangle(10, 5) + calRectangle(5, 10);
        System.out.printf("此圖形面積為：%f \n",totalarea);
    }
    public static double calCircle(int num) {
        return num * num * 3.1415926;
    }
    public static double calTriangle(int base, int height) {
        return base * height / 2.0;
    }
    public static double calRectangle(int width, int height) {
        return width * height;
    }
}