Thread: Strlen( ) function

Ok i created this little dumb prog.. that will output text from a text file.. but.. there is one thing.. the text goes all accross the screen
and i want it so that on a certain char it will just go to the next like i tried it.. but i keeped getting errors =(

Code:

#include <stdio.h>
#include <stdlib.h>

int main( )
{
    char Filename[10] = "test.txt";
    char buff[356];
    int lenght;
    FILE *fp;


    if(( fp = fopen( Filename, "r" )) == NULL )
    {

         fprintf( stderr, "Could not open %s for reading", Filename );
         exit( 1 );

    }

         fgets( buff, 356, fp );
         fprintf( stdout, " %s ", buff );

         getchar( );
         return 0;


}

If you are not searching for a specific character and just a certain number of characters per line, then use 2 for loops to read each character and the first thing outside the inner for loop will be the newline. Then the outer for loop will start the inner for loop again reading characters until that number is hit again, and again, and again, blah blah blah blah.

But wouldn't the for loop just print everything out.. heh i tried it and it gave me an illegal operation =/ can you show me an example on adding the for loop in conjunction to the fgets or stdout

this is how i first did it

Code:

fgets( buff, 356, fp );
      for( l = 0; l < 10; l++ )
      {
         fprintf( stdout, " %s ", l[buff]  );
      }

tring it with one loop to see if it works

ok i done that now all i get is...

t t t t t t t t t t t t t t t t t t t t

instead of it.. giving me just upto the tenth char.. check it... this is what i done

Code:

  if(( fp = fopen( Filename, "r" )) == NULL )
    {

         fprintf( stderr, "Could not open %s for reading", Filename );
         exit( 1 );

    }


      for( l = 0; l < 10; l++ )
      {
         fgets( buff, 256, fp );
         fprintf( stdout, "%c ",buff[i]  );
      }

         getchar( );
         return 0;


}

or do i really need to add the second for look at this moment for it to work? im tring to understand abit here

btw this is what i have in the file that it opens

this is a test of the emergency braudcast system. this is a test and only a test and no action should be taken on your part

You forgot:

Code:

      for( l = 0; l < 10; l++ )
      {
         fgets( buff, 256, fp );
         for (i=0; i<strlen(buff); i++)
         {
             fprintf( stdout, "%c ",buff[ i]  );

         } 
      }

Yes, you need the second loop for each character of buff

>>fprintf( stdout, "%c ",buff[ i] );
Or simply:
putchar(buff[i]);

>for (i=0; i<strlen(buff); i++)
Slight nitpick, but calling strlen as the loop condition can create performance problems. It's just as easy to stick the result in a variable and just retrieve it:

Code:

for (l = 0; l < 10; l++)
{
  int blen;

  fgets(buff, 256, fp);
  blen = strlen(buff);
  for (i = 0; i < blen; i++)
    putchar(buff[i]);
}