Thread: comparing string to strtok

Hello,
Thanks for taking the time to help me out.

Code:

#include <stdio.h>
int main()
{
  //Open the file for reading
  FILE *in = fopen("CommandsProj1.dat", "r");

  //fgets buffer
  char buffer[100];

  //Pieces of string tokenized
  char * stringPiece;


  //While loop. Getting lines from file
  while (!feof(in)){

      fgets(buffer, 100, in);
      stringPiece = strtok (buffer," ");

      while (stringPiece != NULL){
              printf("%s\n",stringPiece);

              if (stringPiece=="H"){printf("Help");}
            
              stringPiece = strtok (NULL, " ");
        }
}

  //Close file
  fclose(in);


  return 0;
}

These 2 lines right here:

Code:

              printf("%s\n",stringPiece);
              if (stringPiece=="H"){printf("Help");}

When I print stringPiece it shows up as H but when I'm comparing it to "H" it doesn't seem that they are equal because I'm not getting the "Help" printed.

Does strok() not return strings in this case?
I am printing it with %s and its coming up correctly but when Im comparing it tells me they arent the same.
How can I proceed to compare the result from strtok() to a string?
(already tried the function strcmp() and have the same problem)

Thanks!

Lolo

Thanks for the reply guys!

new code

Code:

#include <stdio.h>
#include <string.h>
int main()
{
  //Open the file for reading
  FILE *in = fopen("CommandsProj1.dat", "r");

  //fgets buffer
  char buffer[100];

  //Pieces of string tokenized
  char * stringPiece;

  //int for comparing strings
  int compare=2;


  //While loop. Getting lines from file
  while ( fgets(buffer, sizeof(buffer), in) != NULL ){
      fgets(buffer, 100, in);
       // printf("%s\n", buffer);

      stringPiece = strtok (buffer," ");
      while (stringPiece != NULL){


              printf("%s\n",stringPiece);
              compare=strcmp(stringPiece,"H");

              if (compare==0){printf("HELP");}

              //printf("%s\n",stringPiece);
              stringPiece = strtok (NULL, " ");
        }
}

  //Close file
  fclose(in);


  return 0;
}

I put in the strcmp() function, and still;
I print out stringPiece, it shows up as H but when I compare it, it doesn't seem to be the same.

Am I doing something wrong with the compare?
does the string from strtok() have a different structure or something than the "H"?

Also,
When I'm using
while ( fgets(buffer, sizeof(buffer), in) != NULL )
it only prints out halfway through the .dat file.
(will keep on looking into that and try to fix it)

Thanks for the time taken to help me out


Lolo

oops! thanks!
That fixed the problem of not getting every line ^^

But I'm still having the comparing string problem :S
The one I get from strtok() prints the same but doesnt show up as the same as the one I inputted. How should I proceed?

Thanks for your help

Lolo

Thanks for all the help, got it to work using atoi()

=D

end of thread