一.?基礎(chǔ)編程

1.?編寫程序計(jì)算半徑為5的圓的周長(zhǎng)，計(jì)算公式為：周長(zhǎng)=2*半徑*圓周率。

package?suannaigongyuan;

?

import?java.util.Scanner;

import?static??java.lang.System.out;

import?java.util.Date;

import?java.util.Arrays;

import?java.util.Scanner;

?

import?java.util.TreeSet;

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public?class?q3095563063 {

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public?static?void?main(String[] args) {

double?radius=5.0;

double?length;

final?double?pi=3.14;

length=2*radius*pi;

System.out.println("長(zhǎng)是:"+length);

?

}

?

}

2.?編寫程序?qū)⑷A氏溫度78度轉(zhuǎn)換為攝氏溫度，轉(zhuǎn)換成的攝氏溫度在屏幕上顯示出來(lái)： 轉(zhuǎn)換公式為：攝氏度=(5/9)*(華氏度?32)。

package?suannaigongyuan;

?

import?java.util.Scanner;

import?static??java.lang.System.out;

import?java.util.Date;

import?java.util.Arrays;

import?java.util.Scanner;

?

import?java.util.TreeSet;

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public?class?q3095563063 {

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public?static?void?main(String[] args) {

double?hs=78.0;

double?cs;

cs=(5.0/9)*(hs-32);

System.out.println(cs);

}

}

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3.?編寫程序獲取一個(gè)正隨機(jī)三位整數(shù)，將其以如下形式輸出：

所取隨機(jī)數(shù)為：***

它的百位數(shù)字為：*

它的十位數(shù)字為：*

它的個(gè)位數(shù)字為：*

package?suannaigongyuan;

?

import?java.util.Scanner;

import?static??java.lang.System.out;

import?java.util.Date;

import?java.util.Arrays;

import?java.util.Scanner;

?

import?java.util.TreeSet;

?

public?class?q3095563063 {

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public?static?void?main(String[] args) {

int?num?= (int) (Math.random() * 900 + 100);

int?i?= num?/100;

int?j?= num/ 10 % 10;

int?k?= num?% 10;

System.out.println("f取隨機(jī)數(shù)為:"+ num);

System.out.println("它的百位數(shù)為："?+ i);

System.out.println("它的十位數(shù)為:"+j);

System.out.println(" 它的個(gè)位數(shù)為:"+ k);

}

}

二.?編程挑戰(zhàn)

1.?編寫程序，獲得漢字，我，在unicode碼中對(duì)應(yīng)的十進(jìn)制編碼。

package?suannaigongyuan;

?

import?java.util.Scanner;

import?static??java.lang.System.out;

import?java.util.Date;

import?java.util.Arrays;

import?java.util.Scanner;

?

import?java.util.TreeSet;

?

public?class?q3095563063 {

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public?static?void?main(String[] args) {

???????{

???? ???int?a;

???? ???char?b;

???? ???b='我';

???? ???

???? ???a=(int)b;

???? ???

???? ???System.out.println("我="+a);

???? ??

???? ? ???

???????}

}

}

?

2.?編寫程序?qū)崿F(xiàn)一個(gè)數(shù)字分解器，目的是能將一個(gè)1000以內(nèi)的整數(shù)將其分解，并將其各位 數(shù)字之和賦值給一個(gè)整形變量并輸出，比如436,將會(huì)分解得到4, 3, 6,計(jì)算各位數(shù)字之 和為14.

package?suannaigongyuan;

?

import?java.util.Scanner;

import?static??java.lang.System.out;

import?java.util.Date;

?

import?java.util.Scanner;

?

?

?

public?class?q3095563063 {

?

public?static?void?main(String[] args) {

??Scanner sc?= new?Scanner(System.in);

????????int?n?= sc.nextInt();

?

????????????

????????if(0<n?&& n<10) {

????????

????????????System.out.print(n);

????????}

?

????????else?if?(n<100 && 10<=n?) {

????????????int?a?= n/10;

????????????int?b?= n%10;

?

????????????System.out.print(a+" ");

????????????System.out.print(b);

????????}

?

????????else?if(n>=100 && n<1000)

????????{

????????????int?a?= n/100;

????????????int?b?= n%100/10;

????????????int?c?= n%100%10;

?

????????????System.out.print(a+" ");

????????????System.out.print(b+" ");

????????????System.out.print(c);

????????}

????????else?;

?

????}

?

}