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));}elseSystem.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:14.0Process 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;}@Overridepublic void work() {System.out.println("name: " + getName() + "id: " + getWorkNumber() + " salary: " + getSalary() + " bouns" + bonus);}
}
public class Programmer extends Employee{@Overridepublic 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{@Overridepublic void eat() {System.out.println("猫吃鱼");}public void show(){System.out.println(getColor() + " 猫抓老鼠");}
}
public class Dog extends Animal{@Overridepublic 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{@Overridepublic void show() {System.out.println(getName() + "(基础学生)，" + " 年龄： " + getAge() + "正在学基础");}
}
public class BetterSudent extends Sudent{@Overridepublic 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();}
}
