Thread: passing structs to functions?

hi im having a few problems with this program im making. Its a library program being made in unix g++. When i compile i get 2 errors

neil.cc:120: conversion from `cust *' to non-scalar type `cust' requested
neil.cc:123: conversion from `cust *' to non-scalar type `books' requested


im having problems passing my structs to my functions

e.g. when 1 is pressed in the menu the member_list function should run and display all members of the library database. Im reading this data from a text file.

can anyone help im really desperate ??

Code:

#include <iostream.h>
#include <stdlib.h>
#include <string>
#include <fstream.h>

const int maxmembers = 1000;
const int maxbooks = 2000;

struct cust
{
 string surname;
 string house_no;
 string road;
 string  ID;
 int books_borrowed;
};

struct books
{
 string author;
 string title;
 string category;
 string ISBN;
 int loaned;
};

void member_list(cust c)
{
for(int i=0; i< maxbooks;i++)
   {
 cout<< "Surname\t\tHouse No\t\tRoad\t\tID" << endl;
 cout << c.surname[i] << endl;
 cout << c.house_no[i] << endl;
 cout << c.road[i] << endl;
 cout << c.ID[i] << endl;
   }
}

void book_list(books b)
{
for(int i=0; i< maxbooks;i++)
   {
 cout<< "Author\t\tTitle\t\tCategory\t\tISBN" << endl;
 cout << b.author[i] << endl;
 cout << b.title[i] << endl;
 cout << b.category[i] << endl;
 cout << b.ISBN[i] << endl;
   }
}

main()
{
 char uTest[100];
 int cRead = 0;
 int nTest[100];

//variables for type people and books
 books book[maxbooks];
 cust user[maxmembers];

 ifstream user_data;
 user_data.open("userdata.txt",ios::in);

do
 {
   user_data.getline(uTest,100,';');
   user[cRead].surname = uTest;
   user_data.getline(uTest,100,';');
   user[cRead].house_no = uTest;
   user_data.getline(uTest,100,';');
   user[cRead].road = uTest;
   user_data.getline(uTest,100,'\n');
   user[cRead].ID = uTest;

   if (user_data)
     {
cRead++;
     }

 }while (user_data && cRead < maxmembers);

 user_data.close();

 ifstream book_data;
 book_data.open("bookdata.txt",ios::in);

do
 {
   book_data.getline(uTest,100,';');
   book[cRead].author = uTest;
   book_data.getline(uTest,100,';');
   book[cRead].title = uTest;
   book_data.getline(uTest,100,';');
   book[cRead].category = uTest;
   book_data.getline(uTest,100,'\n');
   book[cRead].ISBN = uTest;

   if (book_data)
     {
cRead++;
     }

 }while (book_data && cRead < maxbooks);

 book_data.close();

 int choice;
 cout <<"Library Menu" << endl << endl ;
 cout <<"[1] List Library Members and Member Information" << endl;
 cout <<"[2] List Library Books and Book Information" << endl ;
 cout <<"[3] Issue Library Book" << endl ;
 cout <<"[4] Return Library Book" << endl ;
 cout <<"[5] Exit Library System" << endl ;
 cout <<"Enter Your Required Choice" << endl;
 cin >> choice;
 
 switch(choice)
   {
   case 1:
     member_list(user);
     break;
   case 2:
     book_list(user);
     break;
   case 5:
     exit(1);
     break;
   default:
     cout << "This is not an option" << endl;
     break;
   }

}

[code][/code]tagged by Salem

Two things, first you are trying to pass struct type cust through your function book_list, which takes as a parameter books (NOT cust).

Second, you are trying to pass arrays when the two functions only take single objects. Need to change declarations to:

Code:

void member_list(cust c[])
void book_list(books b[])

[edit] Ya beat me Salem! [/edit]