c - Inputting values from CSV text file into arrays -

for reason program messes in first while loop don't understand why. yesterday using standard redirection input stdin , i'm assuming opening file same thing. why not working now?

this text file saved '.csv' , i'm opening:

hotdog, 10, 2, 1.50
bun, 10, 2, 0.50
burger, 100, 10, 2.00

#include <string.h> #include <stdio.h> #include <stdlib.h>  int main(int argc, char *argv[]) {     int = 0, j = 0;     char command[25], str[100];     int quantity[100], limit[100];     double cost[100];     char *item[100];     char *token, *ptr;      file *fp = fopen("inventory.csv", "rw");     if(fp == null)     {         perror ("error opening file");     }      //testing see if program gets until here, tries copy data csv arrays     while(fgets(str, 100, fp) != null)     {         token = strtok (str,",");         ptr = strdup(token);         item[i] = ptr;         sscanf (token, "%s", item[i]);         token = strtok (null,",");         sscanf (token, "%d", &quantity[i]);         token = strtok (null,",");         sscanf (token, "%d", &limit[i]);         token = strtok (null,"\n");         sscanf (token, "%lf", &cost[i]);         i++;     }      printf("hey");      for(j=0;j<i;j++)         {             printf("%s, %d, %d, %lf\n", item[j], quantity[j], limit[j], cost[j]);         }      strcpy(command, argv[1]);      if(strcmp(command,"list") == 0)     {         for(j=0;j<i;j++)         {             printf("%s, %d, %d, %lf\n", item[j], quantity[j], limit[j], cost[j]);         }     }     else     {         printf("wtf hello");     }     return 0; } 

in following statements sscanf address of entry should given

sscanf (token, "%d", &quantity[i]);

sscanf (token, "%d", &limit[i]);

sscanf (token, "%lf", &cost[i]);