problem description
if you ever tried to read a html document on a macintosh, you know how hard it is if no netscape is installed.
now, who can forget to install a html browser? this is very easy because most of the times you don’t need one on a mac because there is a acrobate reader which is native to mac. but if you ever need one, what do you do?
your task is to write a small html-browser. it should only display the content of the input-file and knows only the html commands (tags)
which is a linebreak and
Input
The input consists of a text you should display. This text consists of words and HTML tags separated by one or more spaces, tabulators or newlines.
A word is a sequence of letters, numbers and punctuation. For example, “abc,123” is one word, but “abc, 123” are two words, namely “abc,” and “123”. A word is always shorter than 81 characters and does not contain any ‘’. All HTML tags are either
or
Output
You should display the the resulting text using this rules:
. If you read a word in the input and the resulting line does not get longer than 80 chars, print it, else print it on a new line.
. If you read a
in the input, start a new line.
. If you read a
Sample Input
Hallo, dies ist eine ziemlich lange Zeile, die in Htmlaber nicht umgebrochen wird.<br>Zwei <br> <br> produzieren zwei Newlines. Es gibt auch noch das tag <hr> was einen Trenner darstellt.Zwei <hr> <hr> produzieren zwei Horizontal Rulers.Achtung mehrere Leerzeichen irritierenHtml genauso wenig wiemehrere Leerzeilen.
Sample Output
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Hallo, dies ist eine ziemlich lange Zeile, die in Html aber nicht umgebrochenwird.Zweiproduzieren zwei Newlines. Es gibt auch noch das tag--------------------------------------------------------------------------------was einen Trenner darstellt. Zwei----------------------------------------------------------------------------------------------------------------------------------------------------------------produzieren zwei Horizontal Rulers. Achtung mehrere Leerzeichen irritieren Htmlgenauso wenig wie mehrere Leerzeilen.
注意点：（1） 每行最多80个字符，如果加上最后一个单词大于80，则最后一个单词移到下一行。（2） <hr>如果处于当前行字符数等于0的情况，则直接输出，否则先输出回车，在输出<hr>,只含有<br>和<hr>标签(3) 文章最后要有一个回车
equals表示的相等，是指向对象的相等；而compareTo的相等，是内容的相等。
不过其中有一个问题，很奇怪~我用equals老是PE，用compareTo就没问题了~~~弄不懂~
代码注释标识了！
有知道原因的大牛，请在评论区指点下，谢啦~
import java.util.Scanner;public class Main{ public static void main(String[] args) { Scanner sc = new Scanner(System.in); String result = new String(""); String str; while (sc.hasNext()) { str = sc.next(); if ("".equals(str)) { continue; } if ("<br>".equals(str)) { System.out.println(result); result = ""; } else if ("<hr>".equals(str)) { if (result.compareTo("")!=0) { // if (!"".equals(result)) {//会WA！！！原因，我也不清楚！！！！ System.out.println(result); } gong.print(); result = ""; } else { String temp = result; if ((temp + " " + str).length() < 80) { if (!"".equals(result)) { result += " " + str; } else { result = str;// 每一行的第一个输入 } } else { System.out.println(result); result = str; } } } if (!("".equals(result))) { System.out.println(result); } }}class gong { static void print() { for (int i = 0; i < 80; i++) System.out.print("-"); System.out.println(); }}
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