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：

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) <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.

 

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 '<' or '>'. All HTML tags are either <br> or <hr>.

 

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 <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.

 

Sample Input

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.

 

Sample Output

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("
");
            //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("
");
                //fprintf(f,"%c",10);
                first = true;
            }
            printf("--------------------------------------------------------------------------------
");
            //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("
%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("
");
    //fclose(f);//文件指针最后要关闭
    return 0;
}