accessing structure issues

This is a discussion on accessing structure issues within the C++ Programming forums, part of the General Programming Boards category; Can anyone please show me whats going wrong here. I'm trying to access a structure from within another structure but ...

  1. #1
    Registered User eth0's Avatar
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    accessing structure issues

    Can anyone please show me whats going wrong here.

    I'm trying to access a structure from within another structure but am recieving errors.

    Structures are global and are as follows:
    Code:
    struct StockItem
    {
        int code;
        char desc[20];
        float price;
    }stock[NUM_OF_ITEMS];
    
    struct BillLine
    {
        StockItem stock;
        float weight;
        float cost;
    }bill_line[50];
    The 'stock' array is already populated.
    My code is as follows:
    Code:
    BillLine bill_item(void)
    {
        BillLine bill;
        int item;
        
        cls();
        cout << "Enter item number purchased: ";
        cin >> item;
        item -= 1;
    /*line 213*/    bill.stock = stock[item];
        cout << "Weight: ";
        cin >> bill.weight;
        
        bill.cost = stock[item].price * bill.weight;
        
        return (bill);
    }
    
    void print_bill ( BillLine bill_line[50], int num_bill_items )
    {
        for (int i=0; i<num_bill_items; ++i)
        {
    /*line 240*/        cout << "Name = " << bill_line[i].stock.desc << endl;
            cout << "Weight = " << bill_line[i].weight << endl;
            cout << "Cost = " << bill_line[i].cost << endl;
        }
    }
    MY compile log is as follows:

    Compiler: Default compiler
    Executing g++.exe...
    g++.exe "C:\Ged\code\assignment\best.cpp" -o "C:\Ged\code\assignment\best.exe" -g3 -O0 -g3 -I"C:\Ged\Dev-Cpp\include\c++" -I"C:\Ged\Dev-Cpp\include\c++\mingw32" -I"C:\Ged\Dev-Cpp\include\c++\backward" -I"C:\Ged\Dev-Cpp\include" -L"C:\Ged\Dev-Cpp\lib"
    C:/Ged/code/assignment/best.cpp: In function `BillLine bill_item()':
    C:/Ged/code/assignment/best.cpp:213: incompatible types in assignment of `
    StockItem' to `StockItem[125]'

    C:/Ged/code/assignment/best.cpp: In function `void print_bill(BillLine*, int)':
    C:/Ged/code/assignment/best.cpp:240: request for member `desc' in `(bill_line +
    (+(i * 3508)))->BillLine::stock', which is of non-aggregate type `
    StockItem[125]'

    Execution terminated
    Last edited by eth0; 01-12-2004 at 07:50 AM.

  2. #2
    and the hat of wrongness Salem's Avatar
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    How about annotating your code snippet with a few line numbers, specifically, the line numbers in the error messages.

    Or is this yet another case of someone writing too much code between compile attempts.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  3. #3
    Registered User eth0's Avatar
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    Hi Salem,

    I've commented in the 2 line numbers which are causing the problems.

    Its not a case of writing too much code. I'm writing one function at a time. The rest of the program works perfectly, its just the section I have posted that i'm having problems with.

    Thanks.

  4. #4
    Registered User eth0's Avatar
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    Nevermind. All sorted now. Thanks.

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