Printing charcter by character

This is a discussion on Printing charcter by character within the C Programming forums, part of the General Programming Boards category; Hi..... I have to parse through an input XML file line-by-line, character-by-character and find if closing HTML tags are present ...

  1. #1
    Ron
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    Printing charcter by character

    Hi.....
    I have to parse through an input XML file line-by-line, character-by-character and find if closing HTML tags are present for every opening HTML tag.

    Code:
    MAIN program:
    	while (scanf("%s", code) != EOF)
    	{
    		i=0;
    		length = strlen(code);
    		while (i < strlen(code))
    		{
    			c=code[i];
    			if (c == '<')
    			{
    	                 j=0;
    
                                     do
    	                         {
    					c=code[i];
    					element[j]=c;
    					++i;
    					j++;
    				}while(c!='>');
    
    				c=code[++i];
    
    				element[j] = '\0';
    
    
    				if (element[1] == '/')
    				{
    					l=element[2];
    					length = strlen(element);
    					for (k=0;k<=length-4;k++)
    					{
    						check[k]=element[l++];
    					}
    					check[k] = '\0';
    					/*Function passsed tho process the element()*/
    					printf("%s",element);
    
    				}
    
    				else
    				{
    					l=element[1];
    
    					length = strlen(element);
    					for (k=0;k<=length-3;k++)
    					{
    						check[k]=element[l++];
    
    					}
    					check[k]='\0';
    					/*Function passsed tho process the element()*/
    					printf("%s",element);
    				}
    
    			}
    			else
    			{
    				putchar(c);
    				c=code[++i];
    			}
    
    		}
    	}
    When printing to the output I find that any character that is printed just after '>' character without any spaces will not be printed to the output. Also no spaces from the input text is printed to the output.

    Please help
    Last edited by Ron; 06-15-2008 at 08:08 PM.

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    c=code[++i] skips past the character after the > (since i was also incremented in the search for the closing > loop as well). It is not possible to read a space using %s.

  3. #3
    Registered User C_ntua's Avatar
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    For the spaces just use fget() reading and checking for the '\n' character.
    (Generally I prefer fget(). You have more control and you just have to use it in a while-loop checking for EOF or '\n' to read a line)

  4. #4
    Ron
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    well i tried removing the line ++i. But still same result. Also, only characters between < & > will be stored in an array and printed as &#37;s, rest will be displayed character-by-character.

    If I were to use fgets(), I will have to use FILE input/ouput. The code will get more complicated then. Our assignment mentions to use standard input. so I can use scanf, gets(), etc.

  5. #5
    and the Hat of Guessing tabstop's Avatar
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    Quote Originally Posted by Ron View Post
    Also, only characters between < & > will be stored in an array and printed as %s, rest will be displayed character-by-character.
    How is that different than what you want?

    Quote Originally Posted by Ron View Post
    If I were to use fgets(), I will have to use FILE input/ouput.
    That's the silliest thing I've ever heard.

  6. #6
    Ron
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    I have to take each line from text as string, parse through it character-by-character. When it encounters <, search for >, make it as a string, if it does not have '!', push it into a stack, else pop the stack.the rest of the contents will be displayed character by charater.

    eg. <title>I am a boy<!title>

    Dont I have to FILE stream to use fgets()?

  7. #7
    Deathray Engineer MacGyver's Avatar
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    Use stdin as the argument for a FILE stream to fgets() if you want to read from standard in (which is usually the keyboard at the console).

    Example:

    Code:
    fgets(..., ..., stdin);

  8. #8
    Ron
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    Re:

    can't I use any other functions besides FILE stream like gets() that will read even space character?

  9. #9
    Deathray Engineer MacGyver's Avatar
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    gets() is broken. Use fgets(). It doesn't require much more work, and it's proper and safe.

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