java
package test3; //0.03mm对折超过8848.13m
public class Duizhe {
public static void main(String[] args) {
double houdu = 0.08;
int cishu = 0;
while (houdu<=8848130){
houdu=houdu*2;
cishu++;
}
System.out.println("需要对折："+cishu+"次");
}
}
package test3; //java作业 c语言作业
public interface Demo{
void javazy();
void czy();
}
public class Jk implements Demo {
@Override
public void javazy(){
//TODO Auto-generated method stub
System.out.println("java作业完成");
}
@Override
public void czy(){
//TODO Auto-generated method stub
System.out.println("c语言作业完成");
}
public static void main(String[] args){
Jk jk = new Jk();
jk.javazy();
jk.czy();
}
}
package test3; //定义集合储存五个学生名字
import java.util.Scanner; //控制台输入名字
public class Jihe { //判断是否在集合内
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String arrayl[] = new String[5];
for(int i = 0; i < arrayl.length; i++) {
System.out.println("请输入第"+(i +1)+"位学生的姓名");
arrayl[i] = scanner.next();
}
System.out.println("输入学生的姓名如下: ") ;
for(String a : arrayl) {
System.out.println(a);
}
System.out.println("请输入要查询的学生姓名:");
String find = scanner.next();
int position = -1;
for(int i = 0;i < arrayl.length; i++) {
if(find.equals(arrayl[i])) {
position = i;
System.out.println(find + "的索引位置是" + position);
}
}
if(position == -1){
System.out.println("未找到");
}
}
}
package test3; //计算1-100除了50之外的累计和
public class Leijia {
public static int leijia(int y)
{
int sum = 0;
for (int j=1;j<101;j++){
if(j==50){
continue;
}
else{
sum+=j;
}
}
return sum;
}
public static void main(String[] args) {
int y=0;
int sum=leijia(y);
System.out.println(sum);
}
}
package test3; //根据身份证分辨男女
import java.util.Scanner;
public class Demo3 {
public static void main(String[] args) {
System.out.println("请输入18位身份证号码：");
Scanner scanner = new Scanner(System.in);
String number = scanner.next();
String sex;
int n = number.charAt(16);
int year,month,day;
if (n%2==0){
sex = "女";
}else{
sex = "男";
}
System.out.println("性别为："+sex);
}
}
package test3; //输入字符串，判断数字出现次数
import java.util.Scanner;
public class Zfc {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int b = 0;
String a= scanner.next ();
char[] ch = a.toCharArray();
for(char c: ch ){
if (c>48 && c<57){
b=b+1;
}
System.out.println(b);
}
}
}
package test3; //数组存储12个成绩并算出平均数
public class Pingjun {
public static void main(String[] args) {
int[] a = {72,89,65,87,91,53,82,71,93,76,68};
int sum = 0;
for (int i = 0; i < a.length; i++){
sum+=a[i];
}
int x = 0;
x = sum /a.length;
System.out.println("平均数："+x);
}
}
package test3;
public class Car {
private String brand;
private double longs;
private String color;
private double price;
public String getBrand() {
return brand;
}
public void setBrand(String brand) {
this.brand = brand;
}
public double getLongs() {
return longs;
}
public void setLongs(double longs) {
this.longs = longs;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public Car(String brand,double longs,String color,double price){
super();
this.brand = brand;
this.longs = longs;
this.color = color;
this.price = price;
}
public Car() {
super();
}
public void run() {
}
public static void main(String[] args) {
Car car1 = new Car("捷达",5.3,"红色",8.9);
Car car2 = new Car("宝马",5.8,"黑色",35.5);
Car car3 = new Car("捷达",5.3,"红色",11.5);
Car car4 = new Car("捷达",5.3,"红色",11.5);
Car car5 = new Car("捷达",5.3,"红色",11.5);
}
}
