Problem on reading a binary file using fread function - c

Question

I am tasked to create an inventory program that stores data using structure and save the data into a binary file. The program should then be able to load the data i.e. the structure elements from the binary file. I am able to save the input data to a binary file using the fwrite function; however, I am having a problem in loading the file to the program using the fread function.
I already looked for similar problems but I can't find a similar case wherein the fread is used to pass the structure elements saved to the structure variable in the program.
This is the code for my structure
struct details {
char name[30];
double price;
int code;
int qty;
};
details item[SIZE];
Function in adding an item to the inventory
int AddItem(int n){
details inputitem;
printheader();
printf("Item Name: ");
scanf("%s", inputitem.name); //check %[^\n]
printf("\nItem Price: ");
scanf("%lf", &inputitem.price);
printf("\nItem Code: ");
scanf("%d", &inputitem.code);
printf("\nQuantity: ");
scanf("%d", &inputitem.qty);
printf("\nItem Added! The ID of the item is %d.\n", n+1);
item[n] = inputitem;
}
Function in displaying the inventory
int DisplayInventory(int n){
printheader();
printf("ID | NAME | CODE | QUANTITY | PRICE \n");
printf("------------------------------------------------------------\n");
for(int i=0; i<n; i++){
printf("%d %-18s %-10d %-10d %-10lf \n",i+1,item[i].name,item[i].code,item[i].qty,item[i].price);
}
}
Function in saving to a binary file
int SaveFile(int n){
FILE *fp;
fp=fopen("C:\\Users\\Royce\\Documents\\CPEPROG2 Goden Final Project\\Inventory.txt","wb");
if(!fp) {
printf("Cannot open file.\n");
system("pause");
exit(1);
}
for(int i=0; i<n; i++){
fwrite(&item[i], sizeof(struct details), 1, fp);
}
fclose(fp);
printf("File is saved!\n");
}
Function in loading the binary file
int LoadFile(int n){
FILE *fp;
fp=fopen("C:\\Users\\Royce\\Documents\\CPEPROG2 Goden Final Project\\Inventory.txt","rb");
if(!fp) {
printf("Cannot open file.\n");
system("pause");
exit(1);
}
struct details inputitem;
int i = 0;
while(fread(&inputitem, sizeof(struct details),1, fp)){
item[i] = inputitem;
i++;
/* printf("%d %-18s %-10d %-10d %-10lf \n",i+1,item[i].name,item[i].code,item[i].qty,item[i].price); */
}
fclose(fp);
printf("File is loaded!\n");
}
I expect the program to show in the DisplayInventory function the details of the structure saved in the binary file. However, nothing shows up at all.
When i try to print the structure in the LoadFile function (using the commented line), all variables show 0.
EDIT
Main Function
int main (){
int choice; //gets the choice of user from the menu
bool condition = 1; //loops the menu
//details item[50];
int count=0; //counts the number of items in the inventory
do{
printheader(); //prints the title of the program
printmenu(); //prints the menu (list of commands)
scanf("%d", &choice);
switch(choice){
case 1: system("cls");
AddItem(count);
count++;
system("PAUSE");
system("cls");
break;
case 2: system("cls");
//EditItem();
system("PAUSE");
system("cls");
break;
case 3: system("cls");
//DeleteItem();
system("PAUSE");
system("cls");
break;
case 4: system("cls");
//ViewItem();
system("PAUSE");
system("cls");
break;
case 5: system("cls");
DisplayInventory(count);
system("PAUSE");
system("cls");
break;
case 6: system("cls");
SaveFile(count);
system("PAUSE");
system("cls");
break;
case 7: system("cls");
LoadFile(count);
system("PAUSE");
system("cls");
break;
case 8: printf("\nThank you!");
exit(0);
break;
default: printf("\nInvalid Input!\n");
getch();
system("cls");
}
}while(condition = 1);
return 0;
}

Answer 1

The program never increments the 'count' variable, so when 'DisplayInventory' is called the value is always 0 and nothing is displayed :
return the i variable in 'LoadFile()' and assign it to the 'count' variable in the main() scope :
in LoadFile :
...
printf("File is loaded!\n");
return i;
}
in main :
...
case 7: system("cls");
count = LoadFile(count);
system("PAUSE");
system("cls");
Note that the 'n' argument in 'int LoadFile(int n)' is not used, you could remove it.