123 / 3 页下一页

楼主: 007pig

java 入门功课求救！！

[复制链接]

007pig

2013-12-3 09:39 PM

slay_alex92 发表于 2013-12-3 09:34 PM
不會啦哈哈
你跑跑看我寫的code，是你要的嗎?

改改下就差不多了哈哈

话说，大大我还能打扰你一下子帮我解释这两题吗。。array 还有那个 method 我看真不懂呢 /.\

1）Write a java program to prompt a user to input five integer numbers into array.
Display the array elements in the reverse order of input. Use loops for both the input
and printing.

2)Write a java program that takes 10 integers as input. The program places the even
integers into an array called evenList, the odd integers into an array called oddList,
and the negative integers into an array called negativeList. The program displays the
contents of the three arrays after all the integers have been entered.

slay_alex92

2013-12-3 09:54 PM

007pig 发表于 2013-12-3 09:39 PM
改改下就差不多了哈哈

话说，大大我还能打扰你一下子帮我解释这两题吗。。array 还有那 ...

第一題

import java.io.*;
public class test1
{
public static void main(String[] args) throws IOException
{
int[] input = new int[5];
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Please enter 5 integers.");
for(int i = 4; i >= 0; i--)
input[i] = Integer.valueOf(br.readLine());
for(int i = 0; i < 5; i++)
System.out.print(input[i] + " ");
}
}

复制代码

slay_alex92

2013-12-3 10:07 PM

本帖最后由 slay_alex92 于 2013-12-3 10:10 PM 编辑

007pig 发表于 2013-12-3 09:39 PM
改改下就差不多了哈哈

话说，大大我还能打扰你一下子帮我解释这两题吗。。array 还有那 ...

第二題

import java.io.*;
public class test2
{
public static void main(String[] args) throws IOException
{
int[] evenList = new int[10];
int[] oddList = new int[10];
int[] negativeList = new int[10];
int evenIndex = 0, oddIndex = 0, negativeIndex = 0;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Please enter 10 integers.");
for(int i = 0; i < 10; i++){
int j = Integer.valueOf(br.readLine());
if(j < 0){
negativeList[negativeIndex] = j;
negativeIndex++;
} else if(j % 2 == 0){
evenList[evenIndex] = j;
evenIndex++;
} else{
oddList[oddIndex] = j;
oddIndex++;
}
}
System.out.print("evenList: ");
for(int i = 0; i < evenIndex; i++)
System.out.print(evenList[i] + " ");
System.out.print("\noddList: ");
for(int i = 0; i < oddIndex; i++)
System.out.print(oddList[i] + " ");
System.out.print("\nnegativeList: ");
for(int i = 0; i < negativeIndex; i++)
System.out.print(negativeList[i] + " ");
}
}

复制代码

slay_alex92

2013-12-3 10:11 PM

007pig 发表于 2013-12-3 09:39 PM
改改下就差不多了哈哈

话说，大大我还能打扰你一下子帮我解释这两题吗。。array 还有那 ...

這是學校的assignment嗎??

007pig

2013-12-3 10:15 PM

slay_alex92 发表于 2013-12-3 10:11 PM
這是學校的assignment嗎??

是啊==我学的很差

slay_alex92

2013-12-3 10:19 PM

本帖最后由 slay_alex92 于 2013-12-3 10:25 PM 编辑

007pig 发表于 2013-12-3 10:15 PM
是啊==我学的很差

你看看我寫的對嗎

你是讀甚麼的阿有JAVA的課好爽喔

神幻

2013-12-3 11:32 PM

各位大大其实java什么啊？好奇

Kikokent

2013-12-4 12:07 AM

slay_alex92 发表于 2013-12-3 09:28 PM
格式不對的話System.out.println()裡面可以自己改，就可以print出你要的格式

哇，你的答案也给到太完整了吧？
谢啦。。。

XiaoNaruto

2013-12-4 02:59 AM

我觉得
Write a java program to prompt a user to input five integer numbers into array.
Display the array elements in the reverse order of input. Use loops for both the input
and printing.

在display loop那里你不应该用
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

初学者的话应该是
用类似这样的,我不是很专业也是入门罢了，由于现在学了很多语言还不是很精通，以下如果我是初学者我会这样做。
for(i = 0; i<5 ; i++)
{
value[i] = keyboard.nextInt();
}

for(i = 5; i>-1 ; i--)
{
System.out.print(value[i] + " ");
}

slay_alex92

2013-12-4 11:10 AM

XiaoNaruto 发表于 2013-12-4 02:59 AM
我觉得
Write a java program to prompt a user to input five integer numbers into array.
Display th ...

哦哦~ 其實我也是剛學不久而已~
而且我是自己買書來學的，所以沒有學得很完整 T.T

我現在才知道有keyboard.nextInt()這個用法~
謝謝你^^

123 / 3 页下一页

返回列表

java 入门功课求救！！

浏览过的版块