Strtok + If Statement - c

Question

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 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
#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?

Answer 1

char *token;
while (token != NULL){
where is token initialized?
Then:
if (delimiter != "\n"||"\t")
You are only comparing pointers in the if controlling expression: use strcmp function to compare strings.

Answer 2

I could see various problems with your code, as listed below:
1.Your while loop is based on token which is not initialized. Better use a do/while.
2.delimiter is a string and cannot be compared using != operator. Use strcmp/strncmp.
3.What is the point of checking delimiter in every iteration when it is the assigned the same value everytime? I am not sure what are you trying to achieve by doing that. AFAIK, the value of delimiter is not changed on a call to strtok.
4.token should pass through a NULL check before every call to strtok as you area allowed to enter a "wrong" string.
5.Nothing wrong with it, but why exactly was fgets used for taking input from stdin, when you could simply do a scanf?
Hope above solves your issues.