strtok() and strcpy

hi, im just learning c and im trying to copy the token to a 2 dimension char array but the array( eq1[][] ) just gets filled with nulls. i cant figure out what im doing wrong...

Code:

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void tokenize(void){
  extern char equation[];
  extern eq1[];
  int i = 0;
  char *token;

  token = strtok( equation, " ");
  while ( token != NULL ){
      printf( "token is %s\n", token);
      strcpy(eq1[i], token);
      token = strtok( NULL, " ")
      printf("eq is %s\n", eq1[i]);
      ++i;
  }
}

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if anyone could help me out id really appreciate it

Presumably you have eq1 defined in your function correctly? Right now it's not a two-d array for you to fill.

I pretty sure right now it is not even something that will pass a compiler:

Code:

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extern eq1[];

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its just a typo, its actually declared like:

extern char eq1[][];

the strtok seems to work, the printf's work but wheni display eq1 i get (null)

Quote:

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Originally Posted by grimlark

its just a typo, its actually declared like:

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So how many more typos do we have to deal with before we get to the real thing? Cut and paste the actual code you are using, or stop trying to waste other people's time.

its the only typo, and it is the actual code im using. i just cant figure out why im getting (null) in eq1 instead of token

Quote:

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Originally Posted by grimlark

its the only typo, and it is the actual code im using. i just cant figure out why im getting (null) in eq1 instead of token

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Like we all didn't see the missing semicolon either.

Quote:

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Originally Posted by grimlark

its just a typo, its actually declared like:

extern char eq1[][];

the strtok seems to work, the printf's work but wheni display eq1 i get (null)

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Surely you need to specify at least the second of those array sizes, so that the compiler can determine where to store the strings.

What is your eq1 defined as? My guess would be that you are mismatching the definition and the declaration, if the first suggestion I made isn't the cause of the problem.

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Mats