day4
2.
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("**************");
System.out.println("存期 年利率");
System.out.println("一年 2.25");
System.out.println("两年 2.7");
System.out.println("三年 3.25");
System.out.println("五年 3.6");
System.out.println("**************");
int n = sc.nextInt();
if (n >= 1000) {
int year = sc.nextInt();
double ans;
if (year == 1) ans = n + n * 2.25 * year;
else if (year == 2) ans = n + n * 2.7 * year;
else if (year == 3) ans = n + n * 4.25 * year;
else ans = n + n * 3.6 * year;
System.out.println(ans);
} else System.out.println("起存金额不足");
}
}
3.
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int flag = sc.nextInt();
int before;
if (flag == 0)
{
before = sc.nextInt();
if (before >= 100) System.out.println(1.0 * before * 0.9);
else System.out.println(before);
}
else
{
before = sc.nextInt();
if (before >= 200) System.out.println(1.0 * before * 0.75);
else System.out.println(1.0 * before * 0.8);
}
}
}
4.
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int before = sc.nextInt();
double up = 0.0;
double a = before * 0.1;
double over = before - a - 5000;
System.out.println(a);
System.out.println(over);
if (over >= 5000)
{
if (over >= 80000)
{
up += (over - 80000) * 0.45;
over = 80000;
}
if (over >= 55000)
{
up += (over - 55000) * 0.3;
over = 55000;
}
if (over >= 35000)
{
up += (over - 35000) * 0.25;
over = 35000;
}
if (over >= 25000)
{
up += (over - 25000) * 0.25;
over = 25000;
}
if (over >= 12000)
{
up += (over - 12000) * 0.2;
over = 12000;
}
if (over >= 3000)
{
up += (over - 3000) * 0.1;
over = 3000;
}
if (over >= 0)
{
up += over * 0.03;
}
System.out.println("纳税：" + up + "税后：" + (before - up - a));
}
else
System.out.println("纳税：" + up + "税后：" + before);
}
}
5.
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int a = sc.nextInt();
int b = sc.nextInt();
int op = sc.nextInt();
int ans;
switch(op)
{
case 1 :
{
ans = a + b;
System.out.println(a + " + " + b + " = " + ans);
break;
}
case 2:
{
ans = a - b;
System.out.println(a + " - " + b + " = " + ans);
break;
}
case 3:
{
ans = a * b;
System.out.println(a + " * " + b + " = " + ans);
break;
}
default:
{
ans = a / b;
System.out.println(a + " / " + b + " = " + ans);
break;
}
}
}
}
6.
一元：0 5角：100
一元：1 5角：90
一元：2 5角：80
一元：3 5角：70
一元：4 5角：60
一元：5 5角：50
一元：6 5角：40
一元：7 5角：30
一元：8 5角：20
一元：9 5角：10
一元：10 5角：0
次数为：11
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int sum = 100;
int cnt = 0;
for (int i = 0;i < 15;i ++)
for (int j = 0;j < 105;j ++)
{
if (10 * i + j == sum)
{
cnt ++;
System.out.println("一元：" + i + " 5角：" + j);
}
}
System.out.println("次数为：" + cnt);
}
}
7.
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
for (int i = 1988;i <= 2019;i ++)
if (i % 100 != 0 && i % 4 == 0 || i % 400 == 0)
System.out.println(i);
}
}
8.
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
for (int i = 1949;i <= 2019;i ++)
if ((i - 1949) % 12 == 0)
System.out.println(i);
}
}
9.
10.
11.
day5
1.
2.
3.
4.
5.
请录入第1件商品的名称:一
请录入第1件商品的数量:1
请录入第1件商品的单价:1
第一件商品录入成功!
请录入第2件商品的名称:二
请录入第2件商品的数量:2
请录入第2件商品的单价:2
第一件商品录入成功!
请录入第3件商品的名称:三
请录入第3件商品的数量:3
请录入第3件商品的单价:3
第一件商品录入成功!
***欢迎来到旺旺超市***
--------------------------
商品名称 数量 单价 金额
一 1 1.0 1.0
二 2 2.0 4.0
三 3 3.0 9.0
--------------------------
总数量:6
总金额:14.0
已优惠金额:0.0
实付金额:14.0
Process finished with exit code 0
public class SuperMarketTicket {
public static void main(String[] args) {
//1.录入商品的信息(商品的名称,数量,单价)
//利用Scanner扫描录入
Scanner scan = new Scanner(System.in);
String[] a = new String[110];
int[] b = new int[110];
double[] c = new double[110];
for (int i = 0;i < 3;i ++)
{
System.out.print("请录入第" + (i + 1) + "件商品的名称:");
a[i] = scan.next();
System.out.print("请录入第" + (i + 1) + "件商品的数量:");
b[i] = scan.nextInt();
System.out.print("请录入第" + (i + 1) + "件商品的单价:");
c[i] = scan.nextDouble();
System.out.println("第一件商品录入成功!");
}
// System.out.print("请录入第一件商品的名称:");
// String goodsName01 = scan.next();//扫描键盘上录入的字符串
// System.out.print("请录入第一件商品的数量:");
// int goodsQuantity01 = scan.nextInt();//扫描键盘上录入的整数
// System.out.print("请录入第一件商品的单价:");
// double goodsPrice01 = scan.nextDouble();//扫描键盘上录入的小数
// //System.out.println(goodsName+" "+goodsQuantity+" "+goodsPrice);
// System.out.println("第一件商品录入成功!");
//
// System.out.print("请录入第二件商品的名称:");
// String goodsName02 = scan.next();//扫描键盘上录入的字符串
// System.out.print("请录入第二件商品的数量:");
// int goodsQuantity02 = scan.nextInt();//扫描键盘上录入的整数
// System.out.print("请录入第二件商品的单价:");
// double goodsPrice02 = scan.nextDouble();//扫描键盘上录入的小数
// System.out.println("第二件商品录入成功!");
//
// System.out.print("请录入第三件商品的名称:");
// String goodsName03 = scan.next();//扫描键盘上录入的字符串
// System.out.print("请录入第三件商品的数量:");
// int goodsQuantity03 = scan.nextInt();//扫描键盘上录入的整数
// System.out.print("请录入第三件商品的单价:");
// double goodsPrice03 = scan.nextDouble();//扫描键盘上录入的小数
// System.out.println("第三件商品录入成功!");
//2.展示购买的商品信息(商品的名称,数量,单价,金额)
System.out.println("***欢迎来到旺旺超市***");
System.out.println("--------------------------");
System.out.println("商品名称 数量 单价 金额");
double[] sum = new double[110];
for (int i = 0;i < 3;i ++)
sum[i] = b[i] * c[i];
// double goodsSubtotal01 = goodsQuantity01 * goodsPrice01;
// double goodsSubtotal02 = goodsQuantity02 * goodsPrice02;
// double goodsSubtotal03 = goodsQuantity03 * goodsPrice03;
for (int i = 0;i < 3;i ++)
System.out.println(a[i] + " " + b[i] + " " + c[i] + " " + sum[i]);;
// System.out.println(goodsName01 + " " + goodsQuantity01 + " " + goodsPrice01 + " " + goodsSubtotal01);
// System.out.println(goodsName02 + " " + goodsQuantity02 + " " + goodsPrice02 + " " + goodsSubtotal02);
// System.out.println(goodsName03 + " " + goodsQuantity03 + " " + goodsPrice03 + " " + goodsSubtotal03);
System.out.println("--------------------------");
//3.小票的统计信息
// int totalQuantity = goodsQuantity01 + goodsQuantity02 + goodsQuantity03;//将所有购买的商品数量加起来
// double totalAmount = goodsSubtotal01 + goodsSubtotal02 + goodsSubtotal03;//将所有购买的商品的小计加起来
// System.out.println("总数量:" + totalQuantity);
// System.out.println("总金额:" + totalAmount);
int totalQuantity = 0;
for(int i = 0;i < 3;i ++)
totalQuantity += b[i];
double totalAmount = 0;
for (int i = 0;i < 3;i ++)
totalAmount += sum[i];
System.out.println("总数量:" + totalQuantity);
System.out.println("总金额:" + totalAmount);
//购买总数量超过10件或者总金额大于100,就在总价的基础上打五折
//||
double discountAmount = (totalQuantity > 10 || totalAmount > 100) ? totalAmount * 0.5 : totalAmount;
System.out.println("已优惠金额:" + (totalAmount - discountAmount));//已优惠金额=总金额-实付金额
System.out.println("实付金额:" + discountAmount);
}
}
6.
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int[] a = {1,2,3,4,5,6,7,8,9,10};
int[] b = new int[110];
int l = 0,r = a.length - 1;
for (int i = 0;i < a.length;i ++)
{
if ((a[i] & 1) == 1) b[l ++] = a[i];
else b[r --] = a[i];
}
for (int i = 0;i < a.length;i ++)
System.out.print(b[i] + " ");
}
}
day6
1
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println(add(1,2));
System.out.println(add(1.1,2.2));
int n = sc.nextInt();
solve(n);
}
public static int add(int a,int b)
{
return a + b;
}
public static double add(double a,double b)
{
return a + b;
}
public static void solve(int n)
{
for (int i = 1;i <= n;i ++)
{
for (int j = 1;j <= i;j ++)
System.out.print(j + " * " + i + " = " + j * i + " ");
System.out.println();
}
}
}
2
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int cnt = 0;
for (int i = 1;i <= 100;i ++)
{
if (check(i))
{
System.out.print(i + " ");
cnt ++;
}
if (cnt == 5)
{
System.out.println();
cnt = 0;
}
}
}
public static boolean check(int x)
{
while(x != 0)
{
if (x % 10 == 9)
{
return false;
}
x /= 10;
}
return true;
}
}
3
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int cnt = 0;
for (int i = 1;i <= 100;i ++)
{
if (is_prime(i))
{
System.out.print(i + " ");
cnt ++;
if (cnt % 5 == 0)
{
System.out.println();
}
}
}
System.out.println("个数:" + cnt);
}
public static boolean is_prime(int n)
{
if (n < 2) return false;
for (int i = 2;i <= n / i;i ++)
if (n % i == 0)
return false;
return true;
}
}
day7
1.
public class phone {
private String brand;
private int price;
private String color;
public String getBrand() {
return brand;
}
public void setBrand(String brand) {
this.brand = brand;
}
public int getPrice() {
return price;
}
public void setPrice(int price) {
this.price = price;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
public void call()
{
System.out.println("正在使用价格为" + price + "元的" + color + brand + "的手机打电话");
}
public void sendMessage()
{
System.out.println("正在使用价格为" + price + "元的" + color + brand + "的手机发短信");
}
}
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
phone ph = new phone();
ph.setPrice(3998);
ph.setBrand("小米");
ph.setColor("黑色");
ph.call();
ph.sendMessage();
}
}
2
public class grilFrind {
private String name;
private double high;
private double weight;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getHigh() {
return high;
}
public void setHigh(double high) {
this.high = high;
}
public double getWeight() {
return weight;
}
public void setWeight(double weight) {
this.weight = weight;
}
public void wash()
{
System.out.println("女朋友帮我洗衣服");
}
public void cook()
{
System.out.println("女朋友帮我做饭");
}
public void show()
{
System.out.println("我的女朋友叫" + name + ",身高" + high + "厘米，体重" + weight + "斤");
wash();
cook();
}
}
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
grilFrind g = new grilFrind();
g.setName("小红");
g.setHigh(165.6);
g.setWeight(90);
g.show();
}
}
3.
public class Manager {
private String name;
private int id;
private int salary;
private int bonus;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getSalary() {
return salary;
}
public void setSalary(int salary) {
this.salary = salary;
}
public int getBonus() {
return bonus;
}
public void setBonus(int bonus) {
this.bonus = bonus;
}
public void work()
{
System.out.println("工号为" + id + "基本工资为" + salary + "奖金为" + bonus + "的" + name + "正在努力的做着管理工作...");
}
}
public class Coder {
private String name;
private int id;
private int salary;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getSalary() {
return salary;
}
public void setSalary(int salary) {
this.salary = salary;
}
public void work()
{
System.out.println("工号为" + id + "基本工资为" + salary + "的" + name + "正在努力写代码...");
}
}
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Manager mg = new Manager();
mg.setName("项目经理");
mg.setId(123);
mg.setSalary(15000);
mg.setBonus(6000);
mg.work();
Coder co = new Coder();
co.setName("程序员");
co.setId(111);
co.setSalary(1100);
co.work();
}
}
4.
public class Cat {
private String color;
private String breed;
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
public String getBreed() {
return breed;
}
public void setBreed(String breed) {
this.breed = breed;
}
public void eat()
{
System.out.println(color + "的" + breed + "正在吃鱼");
}
public void catchMouse()
{
System.out.println(color + "的" + breed + "正在抓老鼠");
}
}
public class Dog {
private String color;
private String breed;
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
public String getBreed() {
return breed;
}
public void setBreed(String breed) {
this.breed = breed;
}
public void eat()
{
System.out.println(color + "的" + breed + "正在吃骨头");
}
public void lookHome()
{
System.out.println(color + "的" + breed + "正在看家");
}
}
public class test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Dog dog = new Dog();
dog.setBreed("藏獒");
dog.setColor("黑色");
dog.eat();
dog.lookHome();
Cat cat = new Cat();
cat.setColor("花色");
cat.setBreed("波斯猫");
cat.eat();
cat.catchMouse();
}
}
day8
1.
public abstract class Employee {
private String name;
private String workNumber;
private double salary;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getWorkNumber() {
return workNumber;
}
public void setWorkNumber(String workNumber) {
this.workNumber = workNumber;
}
public double getSalary() {
return salary;
}
public void setSalary(double salary) {
this.salary = salary;
}
public abstract void work();
}
public class ProjectManager extends Employee {
private double bonus;
public double getBonus() {
return bonus;
}
public void setBonus(double bonus) {
this.bonus = bonus;
}
@Override
public void work() {
System.out.println("name: " + getName() + "id: " + getWorkNumber() + " salary: " + getSalary() + " bouns" + bonus);
}
}
public class Programmer extends Employee{
@Override
public void work() {
System.out.println("name: " + getName() + "id: " + getWorkNumber() + " salary: " + getSalary());
}
}
public class test {
public static void main(String[] args) {
ProjectManager projectManager = new ProjectManager();
projectManager.setName("老王");
projectManager.setWorkNumber("123");
projectManager.setSalary(123);
projectManager.setBonus(12);
projectManager.work();
Programmer programmer = new Programmer();
programmer.setName("小李");
programmer.setWorkNumber("145");
programmer.setSalary(12);
programmer.work();
}
}
2.
public abstract class Animal {
private String color;
private int legs;
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
public int getLegs() {
return legs;
}
public void setLegs(int legs) {
this.legs = legs;
}
public abstract void eat();
}
public class Cat extends Animal{
@Override
public void eat() {
System.out.println("猫吃鱼");
}
public void show()
{
System.out.println(getColor() + " 猫抓老鼠");
}
}
public class Dog extends Animal{
@Override
public void eat() {
System.out.println("狗吃骨头");
}
public void show()
{
System.out.println(getColor() + " 狗看家");
}
}
public class AnimalTest {
public static void main(String[] args) {
Cat cat = new Cat();
cat.setColor("黄");
cat.setLegs(4);
cat.eat();
cat.show();
Dog dog = new Dog();
dog.setColor("黑");
dog.setLegs(4);
dog.eat();
dog.show();
}
}
3.
public abstract class Sudent {
private String name;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public abstract void show();
}
public class BaseSudent extends Sudent{
@Override
public void show() {
System.out.println(getName() + "(基础学生)，" + " 年龄： " + getAge() + "正在学基础");
}
}
public class BetterSudent extends Sudent{
@Override
public void show() {
System.out.println(getName() + "(进阶学生)，" + " 年龄： " + getAge() + "正在学进阶");
}
}
public class SudentTest {
public static void main(String[] args) {
BaseSudent baseSudent = new BaseSudent();
baseSudent.setName("张三");
baseSudent.setAge(18);
baseSudent.show();
BetterSudent betterSudent = new BetterSudent();
betterSudent.setName("李四");
betterSudent.setAge(19);
betterSudent.show();
}
}
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