广东十一选五开奖 > 计算机网络 > 10.23作业 刘惠惠,10.23作业刘惠惠

原标题:10.23作业 刘惠惠,10.23作业刘惠惠

浏览次数:87 时间:2019-10-08

10.23作业 刘惠惠,10.23作业刘惠惠

package cn.person.www;
 
public class Prson {
     
    public int id;
    public String name;
    public int age;
    public String city;
    public String introduce() {
        return "我是" + id + "号, 叫  " + name + ", 今年" + age + "岁了, 来自" + city ;
    } 
 public person(int id,String name,int age,String city) {
     this.id=id; //this关键字,表达的含义是当前对象 .表示当前对象的某个调用
     this.name=name;
     this.age=age;
     this.city=city;
 }
         
}

  

package cn.person.www;
 
public class Demoperson {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        person p1=new person(001,"刘备",40,"北京");
        person p2=new person(002,"关羽",37,"北京");
        person p3=new person(003,"张飞",45,"北京");
        person p4=new person(004,"诸葛亮",25,"北京");
         
        System.out.println(p1.introduce());
        System.out.println(p2.introduce());
        System.out.println(p3.introduce());
        System.out.println(p4.introduce());
         
    }
 
}

  图片 1

刘惠惠,10.23作业刘惠惠 package cn.person.www;public class Prson {public int id;public String name;public int age;public String city;public String introduce()...

作业:
public class HomeWork {
public static void main(String[] args)
{
HomeWork.absolutlyMethod();
HomeWork.calculateMethod();
HomeWork.changeMethod();
HomeWork.chargeMethod();
}

/**
 * 计算分数
 */
public static void calculateMethod()
{
    int score = 0; //总分数
    int num1 = (int)(Math.random()*90+10);
    int num2 = (int)(Math.random()*90+10);
    System.out.println("题目是:"+num1+"+"+num2+",请输入答案");
    Scanner sc = new Scanner(System.in);
    int result = sc.nextInt();

    score +=result == (num1+num2)?10 :-10;

    /*
    if(result == (num1+num2))
    {
        score+=10;
    }
    else
    {
        score-=10;
    }
    */
    System.out.println("得分是:"+score);

}

/**
 * 判断绝对值
 */
public static void absolutlyMethod()
{
    Scanner sc = new Scanner(System.in);
    int value= sc.nextInt();
    if(value>=0)
    {
        System.out.println(value);
    }
    else
    {
        System.out.println((value)*(-1));
    }
}

/**
 * 判断闰年平年
 */
public static void yearMethod()
{
    Scanner sc = new Scanner(System.in);
    int year= sc.nextInt();
    if(year<=0)
    {
        System.out.println("不能回到公元前");
    }
    else if((year%4==0 && year%100!=0) || year%400 == 0)
    {
        System.out.println("是闰年");
    }
    else
    {
        System.out.println("是平年");
    }
}

/**
 * 判断正负数
 */
public static void chargeMethod()
{
    int num = (int)(Math.random()*21-10);
    String str = num>=0?"正数":"负数";
    System.out.println(str);
}

/**
 * 三种交换方法
 */
public static void changeMethod()
{
    int x =20;
    int y =30;

    /*
    int i = x+y;
    x = i - x;
    y = i - y;


    int tmp = x;
    x = y;
    y = tmp;

    x = x ^ y;
    y = x ^ y;
    x = x ^ y;
     */

}

}

Test01:
public class Test01 {
public static void main(String[] args)
{

    int money = 99;
    switch(money)
    {

        case 1:
            System.out.println("吃油条");
            break;
        case 5:
            System.out.println("吃煎饼");
            break;
        case 10:
            System.out.println("套餐");
            break;
        case 10000:
            System.out.println("土豪");
            break;
        default:
            System.out.println("没钱");
            break;
    }
}

}

Test02:
public class Test02 {
public static void main(String[] args)
{
/*
for( int i=4 ;i<5 ; ++i)
{
//i++ 先使用 后加1

        System.out.println(i);
        System.out.println("奥运会");
    }
    */


    /*
    int score = 0;
    for(int i = 0; i < 3; i++)
    {

        Scanner sc = new Scanner(System.in);
        int num1 = (int)(Math.random()*90+10);
        int num2 = (int)(Math.random()*90+10);
        System.out.println("题目是:"+num1+"+"+num2+",请输入答案:");
        int result = sc.nextInt();
        if(result == (num1+num2))
        {
            score+=10;
        }
        else
        {
            score-=10;
        }
        System.out.println("成绩是:"+score);
    }

    */
    Test02.calcMethod();




}
/**
 * 1+2+3+4+....99
 */
public static void calcMethod()
{

    /*
    int sum  = 0;
    for(int i=1;i<100 ; i++)
    {
        sum+=i;
    }
    System.out.println(sum);
    */
    int sum = 0;
    int i  = 0;
    int j = 0;
    for(;i < 7; i++)
    {
        j++;
        if(i == 5)
        {
            sum+=50;
            break;  //结束本次循环体 执行下次循环
        }
        else
        {
            sum+=100;
        }
        System.out.println(i);
    }
    //System.out.println(sum);
    //System.out.println(j);
}

}

Test03:
public class Test03 {
public static void main(String[] args)
{
//break
//continue
for(int i = 0; i< 3; i++)
{
for(int j = 0; j< 3; j++)
{

            System.out.println("j="+j);
            continue;
        }
        System.out.println("i="+i);
    }
}

}

Test04:
public class Test04 {
public static void main(String[] args)
{

// int i = 0;
// while(i<10)
// {
// i++;
// System.out.println(i);
// break;
// }

// calcTableMethod();
// someMethod();
printMethod();

    /**
     * 假设1+2+3+4+......n>3000
     * 求n的最小值
     */

    /**
     * 输出2000到2500间所有的闰年
     */

}
/**
 * 打印九九乘法口诀表
 * 1*1=1
 * 2*1=2 2*2=4
 * 3*1=3 3*2= 6 3*3=9
 * ...........
 * 
 */
public static void calcTableMethod()
{
    for(int i = 1; i<= 9 ;i++)
    {
        for(int j = 1; j <= i; j++)
        {
            System.out.print(i+"*"+j+"="+(i*j)+"   ");
        }
        System.out.println();
    }
}
/**
 * 求3到20中所有的质数
 * 质数:只能被1和自己整除的数
 */
public static void someMethod()
{
    for(int i=3; i<=20; i++)
    {
        for(int j = 2; j<=i ; j++)
        {
            if(i%j==0 && i!=j)
            {
                break;
            }
            if(i%j==0 && i==j)
            {
                System.out.println(i);
            }
        }
    }
}
/**
 * 键盘输入矩形的宽和高
 * 打印出对应的矩形 用“*”表示
 * 例如
 *     *****
 *     *****
 *     *****
 *     *****
 */
public static void printMethod()
{
    Scanner f = new Scanner(System.in);
    System.out.println("请输入矩形的宽:");
    Scanner gf = new Scanner(System.in);
    System.out.println("请输入矩形的高:");
    int k = f.nextInt();  //矩形的宽
    int g = gf.nextInt(); //矩形的高
    for(int i=0;i<k; i++)
    {
        for(int j = 0 ; j < g; j++)
        {
            System.out.print(" *");
        }
        System.out.println();
    }
}

}

Test05:
public class Test05 {
public static void main(String[] args) {
for(int i = 1; i<= 9 ;i++)
{
for(int j = 1; j <= i; j++)
{
System.out.print(i+""+j+"="+(ij)+" ");
}
System.out.println();
}
}
}

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