passing reference to object c++

Okay so I'm doing a little for-fun project, I'm an experienced LAMP developer and I decided to mess around with C++

This code is just my attempt at making a working application thats a little bit more difficult than "Hello World" My problem here is in void Defer(). I want to pass a reference to class PoS to my ItemList, so that it can leverage the tax values when returning receipts and calculations

but here is my error that I'm getting:

"ItemList::ItemList(PoS &pos)" provides no initializer for: -- reference member "ItemList::client"

class PoS {

    private:

        /*

            States



            0: Main Menu

            1: Order Menu

            2: Edit Menu

            3: Tax Menu

            4: Business Menu

        */

        int State; 

        vector<ItemList> Orders;

        bool IsLiveFlag;

        double Tax = 0.06;



    public:

        PoS() {

            // Constructor

        }

// .......

        void Defer() {



            string Command;



            gotoMain:

            ShowMain();



            cin>>Command;

            if (tolowercase(Command) == "1") {

                ItemList order(*this);

                Orders.push_back(order);



                State = 1;

                Orders[Orders.size() - 1].Defer();

                State = 0;

            }

        }

}





class ItemList {



    private:

        vector<Item> Items;

        double Subtotal;

        double Tendered;

        bool   Paid;

        PoS&   client;

    public:





        ItemList(PoS& pos) {

            Subtotal = 0;

            Tendered = 0;

            Paid     = 0;

            PoS&    client = pos;

        }

For some reason I can't get a reference to PoS to send over to my ItemList as a parameter, its really frustrating!

asked Dec 29 '18 at 5:43

user2471817

1

Seek ye the mighty Member Initializer list! In C++ all objects must be fully constructed before entering the body of a constructor. Since a reference cannot be reassigned after initialization, you can't client = pos;. PoS& client = pos; won't do what you need either. That declared a local variable.

– user4581301
Dec 29 '18 at 5:48

The definition of ItemList needs to be before the usage in Defer, not after.

– Peter
Dec 29 '18 at 5:48

add a comment |

Okay so I'm doing a little for-fun project, I'm an experienced LAMP developer and I decided to mess around with C++

but here is my error that I'm getting:

"ItemList::ItemList(PoS &pos)" provides no initializer for: -- reference member "ItemList::client"

class PoS {

    private:

        /*

            States



            0: Main Menu

            1: Order Menu

            2: Edit Menu

            3: Tax Menu

            4: Business Menu

        */

        int State; 

        vector<ItemList> Orders;

        bool IsLiveFlag;

        double Tax = 0.06;



    public:

        PoS() {

            // Constructor

        }

// .......

        void Defer() {



            string Command;



            gotoMain:

            ShowMain();



            cin>>Command;

            if (tolowercase(Command) == "1") {

                ItemList order(*this);

                Orders.push_back(order);



                State = 1;

                Orders[Orders.size() - 1].Defer();

                State = 0;

            }

        }

}





class ItemList {



    private:

        vector<Item> Items;

        double Subtotal;

        double Tendered;

        bool   Paid;

        PoS&   client;

    public:





        ItemList(PoS& pos) {

            Subtotal = 0;

            Tendered = 0;

            Paid     = 0;

            PoS&    client = pos;

        }

For some reason I can't get a reference to PoS to send over to my ItemList as a parameter, its really frustrating!

asked Dec 29 '18 at 5:43

user2471817

1

Seek ye the mighty Member Initializer list! In C++ all objects must be fully constructed before entering the body of a constructor. Since a reference cannot be reassigned after initialization, you can't client = pos;. PoS& client = pos; won't do what you need either. That declared a local variable.

– user4581301
Dec 29 '18 at 5:48

The definition of ItemList needs to be before the usage in Defer, not after.

– Peter
Dec 29 '18 at 5:48

add a comment |

Okay so I'm doing a little for-fun project, I'm an experienced LAMP developer and I decided to mess around with C++

but here is my error that I'm getting:

"ItemList::ItemList(PoS &pos)" provides no initializer for: -- reference member "ItemList::client"

class PoS {

    private:

        /*

            States



            0: Main Menu

            1: Order Menu

            2: Edit Menu

            3: Tax Menu

            4: Business Menu

        */

        int State; 

        vector<ItemList> Orders;

        bool IsLiveFlag;

        double Tax = 0.06;



    public:

        PoS() {

            // Constructor

        }

// .......

        void Defer() {



            string Command;



            gotoMain:

            ShowMain();



            cin>>Command;

            if (tolowercase(Command) == "1") {

                ItemList order(*this);

                Orders.push_back(order);



                State = 1;

                Orders[Orders.size() - 1].Defer();

                State = 0;

            }

        }

}





class ItemList {



    private:

        vector<Item> Items;

        double Subtotal;

        double Tendered;

        bool   Paid;

        PoS&   client;

    public:





        ItemList(PoS& pos) {

            Subtotal = 0;

            Tendered = 0;

            Paid     = 0;

            PoS&    client = pos;

        }

For some reason I can't get a reference to PoS to send over to my ItemList as a parameter, its really frustrating!

asked Dec 29 '18 at 5:43

user2471817

Okay so I'm doing a little for-fun project, I'm an experienced LAMP developer and I decided to mess around with C++

but here is my error that I'm getting:

"ItemList::ItemList(PoS &pos)" provides no initializer for: -- reference member "ItemList::client"

class PoS {

    private:

        /*

            States



            0: Main Menu

            1: Order Menu

            2: Edit Menu

            3: Tax Menu

            4: Business Menu

        */

        int State; 

        vector<ItemList> Orders;

        bool IsLiveFlag;

        double Tax = 0.06;



    public:

        PoS() {

            // Constructor

        }

// .......

        void Defer() {



            string Command;



            gotoMain:

            ShowMain();



            cin>>Command;

            if (tolowercase(Command) == "1") {

                ItemList order(*this);

                Orders.push_back(order);



                State = 1;

                Orders[Orders.size() - 1].Defer();

                State = 0;

            }

        }

}





class ItemList {



    private:

        vector<Item> Items;

        double Subtotal;

        double Tendered;

        bool   Paid;

        PoS&   client;

    public:





        ItemList(PoS& pos) {

            Subtotal = 0;

            Tendered = 0;

            Paid     = 0;

            PoS&    client = pos;

        }

For some reason I can't get a reference to PoS to send over to my ItemList as a parameter, its really frustrating!

c++

asked Dec 29 '18 at 5:43

user2471817

asked Dec 29 '18 at 5:43

user2471817

asked Dec 29 '18 at 5:43

user2471817

asked Dec 29 '18 at 5:43

user2471817

asked Dec 29 '18 at 5:43

user2471817

1

Seek ye the mighty Member Initializer list! In C++ all objects must be fully constructed before entering the body of a constructor. Since a reference cannot be reassigned after initialization, you can't client = pos;. PoS& client = pos; won't do what you need either. That declared a local variable.

– user4581301
Dec 29 '18 at 5:48

The definition of ItemList needs to be before the usage in Defer, not after.

– Peter
Dec 29 '18 at 5:48

add a comment |

1

Seek ye the mighty Member Initializer list! In C++ all objects must be fully constructed before entering the body of a constructor. Since a reference cannot be reassigned after initialization, you can't client = pos;. PoS& client = pos; won't do what you need either. That declared a local variable.

– user4581301
Dec 29 '18 at 5:48

The definition of ItemList needs to be before the usage in Defer, not after.

– Peter
Dec 29 '18 at 5:48

Seek ye the mighty Member Initializer list! In C++ all objects must be fully constructed before entering the body of a constructor. Since a reference cannot be reassigned after initialization, you can't client = pos;. PoS& client = pos; won't do what you need either. That declared a local variable.

– user4581301
Dec 29 '18 at 5:48

The definition of ItemList needs to be before the usage in Defer, not after.

– Peter
Dec 29 '18 at 5:48

add a comment |

1 Answer
1

active

oldest

votes

A reference member variable must be initialized before the body of the constructor. That is the meaning of the compiler error message in your post.

Instead of

ItemList(PoS& pos) {

    Subtotal = 0;

    Tendered = 0;

    Paid     = 0;

    PoS&    client = pos;

}

use

ItemList(PoS& pos) : client(pos) {

    Subtotal = 0;

    Tendered = 0;

    Paid     = 0;

}

You can improve on it by using the same syntactic form to initialize the other member variables also.

ItemList(PoS& pos) : Subtotal(0),

                     Tendered(0),

                     Paid(0),

                     client(pos) {}

answered Dec 29 '18 at 5:48

R Sahu

165k1291184

Can I ask you WHY I'm using : client(pos), both client and pos are the references I want... of PoS class... I just don't understand it, I don't wanna use the code above and not understand it! I appreciate the answer though but is there any way you can ellaborate a lil more? Whats the syntax for the lines above? Also, do I have to still define client in the class' scope as a private variable, if I'd like it to be private, is : client(pos) DECLARING the variable? So confused, I'm so sorry guys I came on here with so many questions!

– user2471817
Dec 29 '18 at 6:48

@user2471817, what do you mean by "I want ... of PoS class ...?

– R Sahu
Dec 29 '18 at 6:54

Sorry, bad english there on my part! I'll correct it! Both "client" and "pos" are where I want the references to be contained of PoS

– user2471817
Dec 29 '18 at 9:05

now I'm getting PS C:cppAcePoS> g++ main.cpp In file included from PoS.h:1:0, from main.cpp:1: ItemList.h:10:9: error: 'PoS' does not name a type PoS& client; ^~~

– user2471817
Dec 29 '18 at 9:06

add a comment |

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A reference member variable must be initialized before the body of the constructor. That is the meaning of the compiler error message in your post.

Instead of

ItemList(PoS& pos) {

    Subtotal = 0;

    Tendered = 0;

    Paid     = 0;

    PoS&    client = pos;

}

use

ItemList(PoS& pos) : client(pos) {

    Subtotal = 0;

    Tendered = 0;

    Paid     = 0;

}

You can improve on it by using the same syntactic form to initialize the other member variables also.

ItemList(PoS& pos) : Subtotal(0),

                     Tendered(0),

                     Paid(0),

                     client(pos) {}

answered Dec 29 '18 at 5:48

R Sahu

165k1291184

Can I ask you WHY I'm using : client(pos), both client and pos are the references I want... of PoS class... I just don't understand it, I don't wanna use the code above and not understand it! I appreciate the answer though but is there any way you can ellaborate a lil more? Whats the syntax for the lines above? Also, do I have to still define client in the class' scope as a private variable, if I'd like it to be private, is : client(pos) DECLARING the variable? So confused, I'm so sorry guys I came on here with so many questions!

– user2471817
Dec 29 '18 at 6:48

@user2471817, what do you mean by "I want ... of PoS class ...?

– R Sahu
Dec 29 '18 at 6:54

Sorry, bad english there on my part! I'll correct it! Both "client" and "pos" are where I want the references to be contained of PoS

– user2471817
Dec 29 '18 at 9:05

now I'm getting PS C:cppAcePoS> g++ main.cpp In file included from PoS.h:1:0, from main.cpp:1: ItemList.h:10:9: error: 'PoS' does not name a type PoS& client; ^~~

– user2471817
Dec 29 '18 at 9:06

add a comment |

A reference member variable must be initialized before the body of the constructor. That is the meaning of the compiler error message in your post.

Instead of

ItemList(PoS& pos) {

    Subtotal = 0;

    Tendered = 0;

    Paid     = 0;

    PoS&    client = pos;

}

use

ItemList(PoS& pos) : client(pos) {

    Subtotal = 0;

    Tendered = 0;

    Paid     = 0;

}

You can improve on it by using the same syntactic form to initialize the other member variables also.

ItemList(PoS& pos) : Subtotal(0),

                     Tendered(0),

                     Paid(0),

                     client(pos) {}

answered Dec 29 '18 at 5:48

R Sahu

165k1291184

Can I ask you WHY I'm using : client(pos), both client and pos are the references I want... of PoS class... I just don't understand it, I don't wanna use the code above and not understand it! I appreciate the answer though but is there any way you can ellaborate a lil more? Whats the syntax for the lines above? Also, do I have to still define client in the class' scope as a private variable, if I'd like it to be private, is : client(pos) DECLARING the variable? So confused, I'm so sorry guys I came on here with so many questions!

– user2471817
Dec 29 '18 at 6:48

@user2471817, what do you mean by "I want ... of PoS class ...?

– R Sahu
Dec 29 '18 at 6:54

Sorry, bad english there on my part! I'll correct it! Both "client" and "pos" are where I want the references to be contained of PoS

– user2471817
Dec 29 '18 at 9:05

now I'm getting PS C:cppAcePoS> g++ main.cpp In file included from PoS.h:1:0, from main.cpp:1: ItemList.h:10:9: error: 'PoS' does not name a type PoS& client; ^~~

– user2471817
Dec 29 '18 at 9:06

add a comment |

A reference member variable must be initialized before the body of the constructor. That is the meaning of the compiler error message in your post.

Instead of

ItemList(PoS& pos) {

    Subtotal = 0;

    Tendered = 0;

    Paid     = 0;

    PoS&    client = pos;

}

use

ItemList(PoS& pos) : client(pos) {

    Subtotal = 0;

    Tendered = 0;

    Paid     = 0;

}

You can improve on it by using the same syntactic form to initialize the other member variables also.

ItemList(PoS& pos) : Subtotal(0),

                     Tendered(0),

                     Paid(0),

                     client(pos) {}

answered Dec 29 '18 at 5:48

R Sahu

165k1291184

A reference member variable must be initialized before the body of the constructor. That is the meaning of the compiler error message in your post.

Instead of

ItemList(PoS& pos) {

    Subtotal = 0;

    Tendered = 0;

    Paid     = 0;

    PoS&    client = pos;

}

use

ItemList(PoS& pos) : client(pos) {

    Subtotal = 0;

    Tendered = 0;

    Paid     = 0;

}

You can improve on it by using the same syntactic form to initialize the other member variables also.

ItemList(PoS& pos) : Subtotal(0),

                     Tendered(0),

                     Paid(0),

                     client(pos) {}

answered Dec 29 '18 at 5:48

R Sahu

165k1291184

answered Dec 29 '18 at 5:48

R Sahu

165k1291184

answered Dec 29 '18 at 5:48

R Sahu

165k1291184

answered Dec 29 '18 at 5:48

R Sahu

165k1291184

Can I ask you WHY I'm using : client(pos), both client and pos are the references I want... of PoS class... I just don't understand it, I don't wanna use the code above and not understand it! I appreciate the answer though but is there any way you can ellaborate a lil more? Whats the syntax for the lines above? Also, do I have to still define client in the class' scope as a private variable, if I'd like it to be private, is : client(pos) DECLARING the variable? So confused, I'm so sorry guys I came on here with so many questions!

– user2471817
Dec 29 '18 at 6:48

@user2471817, what do you mean by "I want ... of PoS class ...?

– R Sahu
Dec 29 '18 at 6:54

Sorry, bad english there on my part! I'll correct it! Both "client" and "pos" are where I want the references to be contained of PoS

– user2471817
Dec 29 '18 at 9:05

now I'm getting PS C:cppAcePoS> g++ main.cpp In file included from PoS.h:1:0, from main.cpp:1: ItemList.h:10:9: error: 'PoS' does not name a type PoS& client; ^~~

– user2471817
Dec 29 '18 at 9:06

add a comment |

Can I ask you WHY I'm using : client(pos), both client and pos are the references I want... of PoS class... I just don't understand it, I don't wanna use the code above and not understand it! I appreciate the answer though but is there any way you can ellaborate a lil more? Whats the syntax for the lines above? Also, do I have to still define client in the class' scope as a private variable, if I'd like it to be private, is : client(pos) DECLARING the variable? So confused, I'm so sorry guys I came on here with so many questions!

– user2471817
Dec 29 '18 at 6:48

@user2471817, what do you mean by "I want ... of PoS class ...?

– R Sahu
Dec 29 '18 at 6:54

Sorry, bad english there on my part! I'll correct it! Both "client" and "pos" are where I want the references to be contained of PoS

– user2471817
Dec 29 '18 at 9:05

now I'm getting PS C:cppAcePoS> g++ main.cpp In file included from PoS.h:1:0, from main.cpp:1: ItemList.h:10:9: error: 'PoS' does not name a type PoS& client; ^~~

– user2471817
Dec 29 '18 at 9:06

Can I ask you WHY I'm using : client(pos), both client and pos are the references I want... of PoS class... I just don't understand it, I don't wanna use the code above and not understand it! I appreciate the answer though but is there any way you can ellaborate a lil more? Whats the syntax for the lines above? Also, do I have to still define client in the class' scope as a private variable, if I'd like it to be private, is : client(pos) DECLARING the variable? So confused, I'm so sorry guys I came on here with so many questions!

– user2471817
Dec 29 '18 at 6:48

@user2471817, what do you mean by "I want ... of PoS class ...?

– R Sahu
Dec 29 '18 at 6:54

Sorry, bad english there on my part! I'll correct it! Both "client" and "pos" are where I want the references to be contained of PoS

– user2471817
Dec 29 '18 at 9:05

now I'm getting PS C:cppAcePoS> g++ main.cpp In file included from PoS.h:1:0, from main.cpp:1: ItemList.h:10:9: error: 'PoS' does not name a type PoS& client; ^~~

– user2471817
Dec 29 '18 at 9:06

add a comment |

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