2013年3月19日
摘要：
class Lader{double above,bottom,height;Lader(){}Lader(double a,double b,double h){above=a;bottom=b;height=h;}public void setAbove(double a){above=a;}public void setBottom(double b){bottom=b;}public void setHeight(double h){height=h;}double Area(){return (above+bottom)*height/2.0;}}public class Examp 阅读全文
摘要：
代码：class Circle{double radius;double getArea(){double area=3.14*radius*radius;return area;}}public class Example4_2{public static void main(String[] args){ Circle circle =new Circle();circle.radius=12.23;double area=circle.getArea();System.out.printf("半径是%5.3f的圆的面积是：\n%5.3f\n",circle.radiu 阅读全文
摘要：
public class Example4_1{public static void main(String[] args){double radius;double area;radius=12.23;area=3.14*radius*radius;System.out.printf("半径是%5.3f的圆的面积是：\n%5.3f\n",radius,area);}} 阅读全文
摘要：
import java.util.Scanner;public class Example3_8{public static void main(String[] args){int n,start,end,middle;int a[]={-2,1,2,3,4,5,6,7,8,9,};start=0;end=a.length;middle=(start+end)/2;int count =0;Scanner reader =new Scanner(System.in);System.out.print("请输入一个整数");n=reader.nextInt();while( 阅读全文