Reposition file pointer to next line?

[bitwise]

If your going through a file line by line and need to suddenly jump to the start of the next line what is a good method to move the FILE pointer to the that next line?

Thanks,
-bitwise

 

[palbano]

huh? seems like u answered ur own question? I must not understand the question.

-pete

 

[marsd]

man fseek().
ex:

  char buf[100];
  FILE *fd;

     fd = fopen(myfile,"r");
     
      if (fd) {
          while ( (fgets(buf,100,fd)) != NULL) {
                if ( (strcmp(buf,"Foo")) == 0) {
                      fseek(fd,100,SEEK_CUR);
                }
           }
       }
  fclose(fd);
  return 0;
}

 

[bitwise]

Your method marsd jumps ahead a random 100 positions. I don't want to do that.

I'll just fgets() the remaining part of the sentence and continue; the loop.

Thanks,
-bitwise

 

[marsd]

Sure, but the idea is the same.
When your condition is met read till a '\n' and
jump 'n' places to the beginning of the next line
as you say.

 

[icici]

hi bitwise

try the syntax cin.getline(....) this should solve your problem.

this is part of TC++ syntax, and should work with other c++ compilers


icici

 

[bitwise]

icici getline() is the same as fgets() just that fgets() is a C function not a C++ function. The program is in C. marsd I should have made the fact more clear, but I'm reading in each word one at a time, not an entire line. Any given word in that sentence may invoke the action to jump to the next line. I can't assume anything about the length of the line. It may have 1 word left in it or it may have 100 words left in it all of varrying sizes. I wanted a simple method that could just reposition to the next line but I guess I'll have to just fgets() the remaining part of the sentence and continue; the loop.

Thanks,
-bitwise

 

[marsd]

Yes, that sounds a bit more complicated.
I don't see how to simplify it given your
criteria.
Good Luck

 

[palbano]

>> I wanted a simple method that could just reposition to
>> the next line

if u want one and it doesn't already exist then u write it ur self... that is why ur calling ur self a programmer yes?

is this a school assignment so you have to use fgets()? if not then perhaps there is a different design altogether that would be more suitable? -There are only 10 types of people in the world, those who understand binary and those who don't-

-pete

 

[bitwise]

Thanks palbano, why didn't I think of that! I'm such an idiot.

-bitwise