Thread: Strtok Problem

hello everyone, im new in here and im having a headache with my program,the thing is that i need to get a input from the keyboard and then separate it using strtok but have to separate the tokens using 4 diferent cases and in each case i need to print the result and save it to a string like this:

input String : Label Instruction #50,Y; Label <with>

and the output should look like this:

Label: Label
Instruction: Instruction
Character 1: #50
Character 2: Y
Comentaries: Label <with>

also it has to be able to reconize if a instruction is missed like this:

Input String: adda

Output String
Label: -----
Instruction: adda
Character 1: -----
Comentaries: -----

My code can accept the first and correct instruction but when i type a incorrect one like in the second input it ignores it and continue like the first atempt just ading <null> sometimes,i have tryed to use if to be able to separate each token with its delimeter but everitime i compile it it ignores the if statement no matter what argument i gave it i dont know what else to do
Heres my code

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <ctype.h>

int main() {     char word[256];
    fgets(word,256,stdin);
   
char *token;
 
while (token != NULL)
    {
            char delimiter[]="\n , ;";
            token=strtok (word,delimiter);
            //if(token != "\n")
            //{
            //char delimiter[]="\n , ;";
            //token=strtok (word,delimiter);
            //if (delimiter != " "||"\t" || "_")
            printf("Label \"%s\"\n", token);
            token = strtok (NULL, "\n , ;");   //(NULL, "_,.-")
            //}
            //token=strtok (word,delimiter);
            //}
            //printf("Label ----------\n");
            //if (delimiter != "\n"||"\t")
            //{
            printf("Instruction \"%s\"\n", token);
            token = strtok (NULL, "\n , ;");   //(NULL, "_,.-")
            //}
            printf("Character \"%s\"\n", token);
            token = strtok (NULL, "\n , ;");   //(NULL, "_,.-")
            printf("Character 2 \"%s\"\n", token);
            token = strtok (NULL, "\n , ;");   //(NULL, "_,.-")
            printf("Comentaries \"%s\"\n",token);
            token = strtok (NULL, ";");
//            printf("Character 2\"%s\"\n", token);
 //           token = strtok (NULL, "\n , ;");   //(NULL, "_,.-")
token = NULL;
    }
            //token = NULL;
            //printf("Comentaries \"%s\"\n", token);
            //token = NULL;
return(0);
}

the // coments are all my failed attempts to try to make it work =(
Can someone help me please?

Ideally you would want to break up the string like this.

Space first:
"Label Instruction #50,Y; Label <with>"
You get Label
Space second using NULL for the first argument:
You get Instruction
"," third, using NULL...:
You get #50
";" fourth, using NULL...:
You get Y
And the residue is Label <with>.

So you will have to use different delimiter strings as you process the input just like I did.

This will not necessarily help you with incorrect input. If the string is outright wrong -- like "adda" -- there is nothing to say that it belongs in the instruction field. The only way to do it right is to follow the format.

" adda,;"
Should parse to
Label: ""
Instruction: adda
The rest would be empty strings as well.