CODEWITHSUNDEEP
c++structstatic-members
Anj Jo
Anj Jo

Reputation: 137

How to access static member of a 'struct' in another source file

I'm creating a small program to do billing. I'm trying to access a static member static double total declared in a header file, in another source file. Java is my first language so having trouble in sorting it out in C++.

When I try i get the following error.

bill.cpp(16): error C2655: 'BillItem::total': definition or redeclaration illegal in current scope

bill.h(8): note: see declaration of 'BillItem::total'

bill.cpp(16): error C2086: 'double BillItem::total': redefinition

bill.h(8): note: see declaration of 'total'

How can I make it available. Googling the error didn't help.

What i want is to implement is to create a static double variable in a struct which will be common to all struct instances. I need to access this static variable in another source file where I will be doing the calculation.

Bill.h

#pragma once

struct BillItem
{
public:
    static double total;
    int quantity;
    double subTotal;
};

Bill.cpp

#include<iostream>
#include "Item.h"
#include "Bill.h" 

void createBill() {
    double BillItem::total = 10;
    cout << BillItem::total << endl;
}

MainCode.cpp

#include <iostream>
#include "Bill.h"

int main() {
    createBill();
    return 0;
}

Upvotes: 5

Views: 1162

Answers (1)

nvoigt
nvoigt

Reputation: 77304

You have not declared your total. Well, you have, but inside a function. It needs to be outside the function scope:

#include<iostream>
#include "Item.h"
#include "Bill.h" 

double BillItem::total = 0;

void createBill() {
    BillItem::total = 10;
    cout << BillItem::total << endl;
}

Upvotes: 5

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