C++ Struct Calling Confusion

[deltatux]

Alright,

I'm getting errors and it's confusing me on how to declare and pass a struct.

http://pastebin.ca/1315254

The error I'm getting is:

Quote:

1>------ Build started: Project: Workshop2, Configuration: Debug x64 ------
1>Compiling...
1>libpos.cpp
1>.\libpos.cpp(24) : error C2027: use of undefined type 'POS'
1> d:\devel\c++\workshop2\workshop2\pointofsales.h(19) : see declaration of 'POS'
1>.\libpos.cpp(24) : error C2228: left of '.taxable' must have class/struct/union
1>.\libpos.cpp(25) : error C2027: use of undefined type 'POS'
1> d:\devel\c++\workshop2\workshop2\pointofsales.h(19) : see declaration of 'POS'
1>.\libpos.cpp(25) : error C2228: left of '.ftax' must have class/struct/union
1>.\libpos.cpp(25) : error C2676: binary '[' : 'POS' does not define this operator or a conversion to a type acceptable to the predefined operator
1>.\libpos.cpp(25) : error C2228: left of '.price' must have class/struct/union
1>.\libpos.cpp(26) : error C2027: use of undefined type 'POS'
1> d:\devel\c++\workshop2\workshop2\pointofsales.h(19) : see declaration of 'POS'
1>.\libpos.cpp(26) : error C2228: left of '.ptax' must have class/struct/union
1>.\libpos.cpp(26) : error C2676: binary '[' : 'POS' does not define this operator or a conversion to a type acceptable to the predefined operator
1>.\libpos.cpp(26) : error C2228: left of '.price' must have class/struct/union
1>.\libpos.cpp(28) : error C2027: use of undefined type 'POS'
1> d:\devel\c++\workshop2\workshop2\pointofsales.h(19) : see declaration of 'POS'
1>.\libpos.cpp(28) : error C2228: left of '.ftax' must have class/struct/union
1>.\libpos.cpp(29) : error C2027: use of undefined type 'POS'
1> d:\devel\c++\workshop2\workshop2\pointofsales.h(19) : see declaration of 'POS'
1>.\libpos.cpp(29) : error C2228: left of '.ptax' must have class/struct/union
1>.\libpos.cpp(31) : error C2027: use of undefined type 'POS'
1> d:\devel\c++\workshop2\workshop2\pointofsales.h(19) : see declaration of 'POS'
1>.\libpos.cpp(31) : error C2228: left of '.quantity' must have class/struct/union
1>.\libpos.cpp(31) : error C2027: use of undefined type 'POS'
1> d:\devel\c++\workshop2\workshop2\pointofsales.h(19) : see declaration of 'POS'
1>.\libpos.cpp(31) : error C2228: left of '.price' must have class/struct/union
1>.\libpos.cpp(32) : error C2027: use of undefined type 'POS'
1> d:\devel\c++\workshop2\workshop2\pointofsales.h(19) : see declaration of 'POS'
1>.\libpos.cpp(32) : error C2228: left of '.quantity' must have class/struct/union
1>.\libpos.cpp(32) : error C2027: use of undefined type 'POS'
1> d:\devel\c++\workshop2\workshop2\pointofsales.h(19) : see declaration of 'POS'
1>.\libpos.cpp(32) : error C2228: left of '.ftax' must have class/struct/union
1>.\libpos.cpp(32) : error C2027: use of undefined type 'POS'
1> d:\devel\c++\workshop2\workshop2\pointofsales.h(19) : see declaration of 'POS'
1>.\libpos.cpp(32) : error C2228: left of '.ptax' must have class/struct/union
1>pointofsales.cpp
1>.\pointofsales.cpp(37) : error C2676: binary '[' : 'POS' does not define this operator or a conversion to a type acceptable to the predefined operator
1>.\pointofsales.cpp(37) : error C2228: left of '.quantity' must have class/struct/union
1>.\pointofsales.cpp(46) : error C2664: 'posmath' : cannot convert parameter 1 from 'POS' to 'POS *'
1> No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
1>.\pointofsales.cpp(49) : error C2065: 'ftax' : undeclared identifier
1>.\pointofsales.cpp(50) : error C2065: 'ptax' : undeclared identifier
1>Generating Code...
1>Compiling...
1>main.cpp
1>Generating Code...
1>Build log was saved at "file://d:\devel\c++\Workshop2\Workshop2\x64\Debug\BuildLog.htm"
1>Workshop2 - 29 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Please help.

Thanks,
deltatux

[A.J]

could you show me a copy of the code that you tried to compile (or is that what the link you provided is for?)

[deltatux]

the link shows the code.

and it's an Not For Work code (since some guy told me it's a requirement for GPL'd code here....)

Thanks,
deltatux

[A.J]

k, i think ur problem is this :

c++:

struct POS sales;

it should instead be :

c++:

POS sales;

[deltatux]

nevermind, I fixed it with my friend's suggestion.

Just by moving the struct to the header, it fixed it.

Now, I'm getting another LNK2019 error.

1>pointofsales.obj : error LNK2019: unresolved external symbol "void __cdecl posmath(struct POS,int *,double *,double *)" (?posmath@@YAXUPOS@@PEAHPEAN2@Z) referenced in function "void __cdecl initPOS(void)" (?initPOS@@YAXXZ)
1>D:\devel\c++\Workshop2\x64\Debug\Workshop2.exe : fatal error LNK1120: 1 unresolved externals

deltatux

[A.J]

can u show me what u fixed?

[DemonWasp]

deltatux @ Wed Jan 21, 2009 11:00 pm wrote:

1>pointofsales.obj : error LNK2019: unresolved external symbol "void __cdecl posmath(struct POS,int *,double *,double *)" (?posmath@@YAXUPOS@@PEAHPEAN2@Z) referenced in function "void __cdecl initPOS(void)" (?initPOS@@YAXXZ)
1>D:\devel\c++\Workshop2\x64\Debug\Workshop2.exe : fatal error LNK1120: 1 unresolved externals

This error message is telling you it can't find the method:

code:

void posmath ( struct POS , int *, double *, double *)

Where is that function declared, where is it defined? Are you sure both are being included properly? Are you sure the argument lists match exactly?