Java第十次作业
1.编写一个方法,实现冒泡排序(由小到大),并调用该方法
package homework; public class Home5 { public static void main(int x[] ) { // 1.编写一个方法,实现冒泡排序(由小到大),并调用该方法 int a = 0; for (int i = x.length - 1; i > 0; i--) { for (int j = 0; j < i; j++) { if (x[j] > x[i]) { a = x[j]; x[j] = x[i]; x[i] = a; } } } } public static void main(String[] args) { int x[] = { 9, 5, 7, 2, 3, 1, 10 }; main(x); for (int i : x) { System.out.print(i + " "); } } }
2.编写一个方法,求整数n的阶乘,例如5的阶乘是1*2*3*4*5。 [必做题]
package week10; public class Jc { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub int sum1=jc(5); System.out.println(sum1); } public static int jc(int n){ int sum=1; for (int i =1; i <=n; i++) { sum*=i; } return sum; } }
3.编写一个方法,判断该年份是平年还是闰年。[必做题]
package test; import java.util.Scanner; public test { public static void lq(){ // TODO 自动生成的方法存根 System.out.println("请输入一个年份"); bc(); } public static void bc() { Scanner input=new Scanner(System.in); int a=input.nextInt(); if(a%4==0||a%400==0&&a%100!=0) System.out.println("是闰年"); else System.out.println("不是闰年"); } public static void main(String[] args){ lq(); } }
4.课堂没完成的menu菜单,实现幸运抽奖功能
import java.util.Scanner; public class test { public static void px() { Scanner input = new Scanner(System.in); System.out.println("输入5个数:"); int a[] = new int[5]; int b; for (int i = 0; i < a.length; i++) { a[i] = input.nextInt(); } for (int i = 0; i < a.length - 1; i++) { for (int j = i+1; j < a.length; j++) { if (a[i] > a[j]) { b = a[i]; a[i] = a[j]; a[j] = b; } } } for (int i = 0; i < a.length; i++) { System.out.print(a[i]); System.out.print(" "); } System.out.println(); } public static void main(String[] args) { px(); } }