Thread: load file to structure

Originally Posted by bithub

ftell() returns the position of the file stream. In this case (since you just opened the file), it will return zero. if(0 == NULL) is evaluating to true, so your program is exiting.

Thank you. I used fseek() before ftell()

THis how I changed it , I decided to use do while instead of for loop, but it still not working, it loops though the loop, but I don't see any data that in the file to be stored into linked list

Code:

#include<stdio.h>
#include<stdlib.h>
#include"keytype.h"

void load(KEYS k,char *fn)
{
	KEYS curr;
	FILE* fp;
	
	k=(KEYS*)malloc(sizeof(KEYS));
	curr=k;

	if((fp=fopen(fn, "r"))== NULL)
	{
		printf("Error, the file does not exist");
		exit(1);
	}
	
	fseek (fp, 0, SEEK_END);

	if(ftell(fp)==0)
	{
		printf("IIIII\n");
		exit(2);
	}

	do
	{
		curr->next=(KEYS*)malloc(sizeof(KEYS));

		fscanf(fp, "%s", curr->next->addressee);
		fscanf(fp, "%s", curr->next->sender);
		fscanf(fp, "%s", curr->next->regarding);
		fscanf(fp, "%d%*c%d%*c%d", &curr->next->date.month, &curr->next->date.day, &curr->next->date.year);
		fscanf(fp, "%d", &curr->next->id);
		fscanf(fp, "%s", curr->next->fname);
		
	}while(!feof(fp));

	curr->next=NULL;

	fclose(fp);
	/*
	curr=k;
	 while(curr!=NULL)
	{
		 printf( "%s\n", curr->addressee);
		 curr=curr->next;
	}
	*/
}