1.编写一个方法，实现冒泡排序（由小到大），并调用该方法

import java.util.Scanner;

public class hhh {

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();
}
}



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]

import java.util.Scanner;
public class hhh{

public static int jc(int a){
int sum=1;
for(int i=1;i<=a;i++){
sum*=i;
}
return sum;
}
public static void main(String[] args){
System.out.println(jc(5));
}
}

3.编写一个方法，判断该年份是平年还是闰年。[必做题]

import java.util.Scanner;
public class hhh{

public static void jj() {
Scanner input=new Scanner(System.in);
int a=input.nextInt();
if (a % 400 == 0 & a % 100 != 0 | a % 4 == 0)
System.out.println("闰年");
else
System.out.println("平年");
}
public static void main(String[] args) {
pr();
}
}

import java.util.Scanner;

public class hhh {

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();
}
}

posted on 2021-05-12 14:22  莉莉娅king  阅读(40)  评论(0编辑  收藏  举报