c - Strcmp does not do the comparing -

why isn't comparing between strings work? know user strings not have endlines @ end of them, still username not accepted.

char user[24]; int userlog = -1;  file  *usernames; usernames = fopen("usernames.cfg", "r");  if (usernames == null){     perror("usernames - err");     return(-1); }  while(fgets(user, sizeof(user), usernames) !=null){      strtok(user, "\n");     printf("%s -- %s\n", user, possibleusername);      // first edition of question contained:     // if((possibleusername, user) == 0)     // still having problems version:     if(strcmp(possibleusername, user) == 0)         userlog = 1;     else          userlog = 0;  }  if(userlog == 1) printf("username accepted:   %s\n", possibleusername); else if(userlog == 0) printf("username doesn't exist in database.\n"); fclose(usernames); 

usernames.cfg:

user justplayit etc 

i suppose should be

if(strcmp(possibleusername, user) == 0) 

because expression

(possibleusername, user) == 0 

is equal to

user == null 

edit

change

int userlog = -1; 

to

int userlog = 0; 

and delete

else     userlog = 0;