Htykuut

I have a text file with default data that I created. Now I want to put them into my Array. But not success.. I dont know why only the first record of the struct data can store in my array.

I want first 9 records stored in Arr[0], secord 9 records stored in Arr[1]
, and third 9 record stored in Arr[2] But the result is only recordNum can store in Arr[ I ].

I am very grateful and proud of you if you can help me because i try many time can not success

Here is my data file content:

1001 - bric - 1 - human - 10 - 70.00  - Eric - home - arrive



1002 - She  - 1 - human - 10 - 50.00  - she  - home - arrive



1003 - She  - 2 - human - 10 - 120.00 - Eric - home - arrived

Here is my Code:

#include <stdio.h>

#include <stdlib.h>

#include<string.h>



struct record{

   char recordnum [40];

   char itemrecord [40];

   char quantity [40];

   char weight [40];

   char itemname [40];

   char catagory [40];

   char recipient [40];

   char final_destination [40];

   char status [40];

};



int main(){

   FILE *fileptr1, *fileptr2, fileptr3;

   char filename[40]="data.txt";

   int save; 

   char delete_num ;

   char reply;

   int  n=1 , i=0;

   #define MAX 9

   struct record Arr[MAX];



   printf("Enter file name: ");

   scanf("%s", filename);



   //open file in read mode

   fileptr1 = fopen(filename, "r");

   if (fileptr1== NULL){

      printf("open unsuccessful,file not exist"); 

      exit(1);

   }



   while(n>0){

      n=fscanf(fileptr1,"%s %s %s %s %s %s %s %s %s",Arr[i].recordnum, 

      Arr[i].itemname, Arr[i].itemrecord, Arr[i].catagory, Arr[i].quantity, 

      Arr[i].weight, Arr[i].recipient, Arr[i].final_destination, 

      Arr[i].status ); 

      i++;

   }

   n=i;

   for(i=0; i<n-1 ;i++){

      printf("%s n"  ,Arr[i]);

   }

   fclose(fileptr1);

   return 0;

}

Result:

Enter file name: data.txt

1001

1002

1003

The printf function's "%s" format is for strings.
Strings in c are represented as one dimensional arrays (or a pointer to a portion of memory) containing characters and ended by a '' character.

Here you are trying to print a variable of type struct record with this format, which is undefined behaviour, in your example it happens that the bytes pointed by Arr + i(which is the address of the value Arr[i] of type struct record) are those of Arr[i].recordnum, therefore because you told printf to treat those bytes as string using the "%s" format, the characters are printed until a '' character is met. However, this is undefined behaviour because depending on architectures, structs might have padding bytes at the beginning instead of the bytes of their first field.

There is no printf format to print your custom struct, so you need to manually print each of your struct fields using their respective formats, in your case %s.

printf("%s, ..., %sn", Arr[i].recordnum, ..., Arr[i].status);