水题：HDU-1088-Write a simple HTML Browser（模拟题）

解题心得：
1、仔细读题，细心细心。。。。。。
2、题的几个要求：超过八十个字符换一行，<br>换行，<hr>打印一个分割线，最后打印一个新的空行。主要是输出要求比较多。
3、检验的时候可以使用文件读入和文件输出，这样方便判别。

题目：

[align=left]Problem Description[/align]
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) <br> which is a linebreak and <hr> which is a horizontal ruler. Then you should treat all tabulators, spaces and newlines
as one space and display the resulting text with no more than 80 characters on a line.

 

[align=left]Input[/align]
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 '<' or '>'. All HTML tags are either <br>
or <hr>.

 

[align=left]Output[/align]
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 <br> in the input, start a new line.

  . If you read a <hr> in the input, start a new line unless you already are at the beginning of a line, display 80 characters of '-' and start a new line (again).

The last line is ended by a newline character.

 

[align=left]Sample Input[/align]

Hallo, dies ist eine
ziemlich lange Zeile, die in Html
aber 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 irritieren

Html genauso wenig wie

mehrere Leerzeilen.

 

[align=left]Sample Output[/align]

Hallo, dies ist eine ziemlich lange Zeile, die in Html aber nicht umgebrochen
wird.
Zwei

produzieren zwei Newlines. Es gibt auch noch das tag
--------------------------------------------------------------------------------
was einen Trenner darstellt. Zwei
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
produzieren zwei Horizontal Rulers. Achtung mehrere Leerzeichen irritieren Html
genauso wenig wie mehrere Leerzeilen.

#include<stdio.h>
#include<iostream>
#include<string>
#include<cstring>
using namespace std;
int main()
{
bool first = false;
//FILE *f;//注意使用文件指针
char a[90];
int leng = 0;
//f = fopen("new.txt","w");//文件指针会自动向下转移不用手动
while(~scanf("%s",a))
{
if(strcmp(a,"<br>") == 0)//c语言中可这样判别两个字符串是否一样，如果一样会返回0；
{
first = true;
printf("\n");
//fprintf(f,"%c",10);
leng = 0;
continue;
}

if(strcmp(a,"<hr>") == 0)
{
if(leng != 0)//连续两个<br>要注意有没有多余的空行。
{
printf("\n");
//fprintf(f,"%c",10);
first = true;
}
printf("--------------------------------------------------------------------------------\n");
//fprintf(f,"%s","--------------------------------------------------------------------------------");
//fprintf(f,"%c",10);
leng = 0;
first = true;
continue;
}
else
{
if(leng == 0)
{
first = false;
printf("%s",a);
leng += strlen(a);
//for(int i=0;i<strlen(a);i++)
//fprintf(f,"%c",a[i]);
}
else if((leng+strlen(a)+1)<=80)
{
printf(" %s",a);
//fprintf(f,"%c",32);
//for(int i=0;i<strlen(a);i++)
//fprintf(f,"%c",a[i]);
leng = strlen(a) + 1 + leng;//这里+1是因为有空格；
}
else
{
printf("\n%s",a);
//fprintf(f,"%c",10);
//for(int i=0;i<strlen(a);i++)
//fprintf(f,"%c",a[i]);
leng = strlen(a);
first = false;
}
}
}
if(!first)//要有一个新的空行，不然PE；
printf("\n");
//fclose(f);//文件指针最后要关闭
return 0;
}