Passing class/object error - c++

I'm working on an assignment but I can't figure out why I'm getting these errors:
Error 1 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
Error 2 error C2143: syntax error : missing ',' before '&'
Its referring to this line of code
ISBN ( const char* str, const ISBNPrefix &list );
ISBNPrefix is another class in a separate header file, and my professor/school tells us not to change the requirements of the assignment. I just don't understand why I'm getting those 2 errors.
Can anyone clarify?

Forward declaration was needed.
class ISBNPrefix;
class ISBN
{
etc, etc.
};

Error 1 means the compiler sees the line of code as a function declaration without a return type. Maybe you meant
ISBN::ISNB(...);
or
void ISBN(...);

Have you included the other file with #include "otherfile.h" ?

Related

When im moving a class to a header file i get an error C++

Something annoying is going on here and I hope the community can help me :). My program is working correctly when I have my class in the cpp file. When I move my class code into a header file the program throws errors. Please instruct me. Thank you!
.cpp file
#include <iostream>
#include <string>
#include "CSquare.h"
using namespace std;
int main()
{
CSquare alo(1,"name");
}
CSquare.h
#pragma once
class CSquare
{
private:
int squareCode;
string squareName;
public:
CSquare(int, string);
void setCode(int);
void setName(string);
};
CSquare::CSquare(int inputSquareCode, string inputSquareName)
{
setCode(inputSquareCode);
setName(inputSquareName);
}
void CSquare::setCode(int inputSquareCode)
{
squareCode = inputSquareCode;
}
void CSquare::setName(string inputSquareName)
{
squareName = inputSquareName;
}
I have also tried moving the #include string in both files but still, nothing seems to fix the problem :/
error C3646: 'squareName': unknown override specifier error C4430: missing type specifier - int assumed. Note: C++ does not support default-int error C2061: syntax error: identifier 'string' C2061: syntax
error: identifier 'string' – Mash 16 mins ago
error C2061: syntax error: identifier 'string'
error C2065: 'inputSquareName': undeclared identifier
error C2065: 'string': undeclared identifier error C2146: syntax error: missing ')' before identifier 'inputSquareName'
error C2143: syntax
error: missing ';' before '{'
error C2447: '{': missing function header (old-style formal list?)
error C2661: 'CSquare::CSquare': no overloaded function takes 2 arguments –
CSquare.h lacks the definition for the type string.
Solution: Perhaps you intended to use std::string. In that case you must include <string> in CSquare.h and use the scope resolution operator to refer to the string declared in the std namespace. See the first sentence of this paragraph for an example.
CSquare.h contains definitions to non-inline functions. If the header is included in more than one translation unit, then you violate the one definition rule.
In the entire program, an object or non-inline function cannot have more than one definition
Solution: Either define the functions in a single source file, or declare the functions inline.

Passing template class instance to a constructor of another class

My code:
BlockyWorld.hpp
#ifndef BLOCKYWORLD_H
#define BLOCKYWORLD_H
#include <CImg.h>
namespace logic {
class BlockyWorld {
public:
BlockyWorld( const CImg<float>* heightmap );
};
}
#endif // BLOCKYWORLD_H
BlockyWorld.cpp
#include "BlockyWorld.hpp"
namespace logic {
BlockyWorld::BlockyWorld( const CImg<float>* heightmap ) {}
}
main.cpp
#include <CImg.h>
#include "logic/BlockyWorld.hpp"
//...
CImg<float> heigthMap;
logic::BlockyWorld world( &heigthMap );
//...
I get alot of errors while compiling:
main.cpp:
include\logic\blockyworld.hpp(9): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
include\logic\blockyworld.hpp(9): error C2143: syntax error : missing ',' before '<'
main.cpp(85): error C2664: 'logic::BlockyWorld::BlockyWorld(const logic::BlockyWorld &)' : cannot convert argument 1 from 'cimg_library::CImg<float>' to 'const int'
1> No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
BlockyWorld.hpp & cpp
include\logic\blockyworld.hpp(9): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
include\logic\blockyworld.hpp(9): error C2143: syntax error : missing ',' before '<'
include\logic\blockyworld.cpp(4): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
include\logic\blockyworld.cpp(4): error C2143: syntax error : missing ',' before '<'
I don't think it's a circular inclusion error which sometimes causes these kinds of errors for me=).
I must be defining constructor wrong or maybe I'm defining implementation wrong? Was searching for an answer for abount an hour now so I would really use an explanation now.
And just to clarify - I'm not a beginner c/c++ programmer but these templates are confusing :(
Have a nice day and thank your for your answers.
CImg appears to be part of the cimg_library namespace.
Either add using namespace cimg_library to the top of your BlockyWorld.hpp file, or change the function signature to use the namespace like so:
BlockyWorld( const cimg_library::CImg<float>* heightmap );
Along with πάντα ῥεῖ's suggestion of matching up your pointer and reference types.

Why C++ not know TIMESTAMP_STRUCT type?

I use Visual Studio 2005
When I compile, I get this error:
Error 1 error C2146: syntax error : missing ';' before identifier 'mDropEndTime'
Error 2 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
struct MB_SYN_DROPITEM_UPDATE : MSGBUF
{
long mCid; // Index
unsigned long mItemIdx; // idx
TIMESTAMP_STRUCT mDropEndTime; // This is error line
};
Why doesn't C++ know TIMESTAMP_STRUCT?
TIMESTAMP_STRUCT is something defined in sqlext.h
You must add
#include <sqlext.h>
Because TIMESTAMP_STRUCT is not part of the C++ standard.

C++ Beginner - Trouble using classes inside of classes

I am working on a college project, where I have to implement a simple Scrabble game.
I have a player class (containing a Score and the player's hand, in the form of a std::string, and a score class (containing a name and numeric (int) score).
One of Player's member-functions is Score getScore(), which returns a Score object for that player. However, I get the following error on compile time:
player.h(27) : error C2146: syntax error : missing ';' before identifier 'getScore'
player.h(27) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
player.h(27) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
player.h(27) : warning C4183: 'getScore': missing return type; assumed to be a member function returning 'int'
player.h(35) : error C2146: syntax error : missing ';' before identifier '_score'
player.h(35) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
player.h(35) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
Here's lines 27 and 35, respectively:
Score getScore(); //defined as public
(...)
Score _score; //defined as private
I get that the compiler is having trouble recognizing Score as a valid type... But why? I have correctly included Score.h at the beginning of player.h:
#include "Score.h"
#include "Deck.h"
#include <string>
I have a default constructor for Score defined in Score.h:
Score(); //score.h
//score.cpp
Score::Score()
{
_name = "";
_points = 0;
}
Any input would be appreciated!
Thanks for your time,
Francisco
EDIT:
As requested, score.h and player.h:
http://pastebin.com/3JzXP36i
http://pastebin.com/y7sGVZ4A
You've got a circular inclusion problem - relatively easy to fix in this case.
Remove the #include "Player.h" from Score.h.
See this question for an explanation and discussion of what you'd need to do if Score actually used Player.
As for the compiler errors you're getting, that's how Microsoft's compiler reports the use of undefined types -you should learn to mentally translate them all into "Type used in declaration not defined".
Your problem is the recursive include: Score.h is trying to include Player.h, and Player.h is trying to include Score.h. Since the Score class doesn't seem to actually be using the Player class, removing #include "Player.h" from Score.h should solve your problem.
You have a circular dependency problem : Score.h includes Player.h and Player.h includes Score.h.
Do solve this problem, delete your include to Player.h in Score.h and define class Player; if you need to use it in Score class.

Trouble compiling a header file in VC++

I just reorganized the code for a project and now I'm getting errors I can't resolve. This header is included by a .cpp file trying to compile.
#include "WinMain.h"
#include "numDefs.h"
#include <bitset>
class Entity
{
public:
Entity();
virtual ~Entity();
virtual bitset<MAX_SPRITE_PIXELS> getBitMask();
virtual void getMapSection(float x, float y, int w, int h, bitset<MAX_SPRITE_PIXELS>* section);
};
I'm getting these compiler errors for the declaration of Entity::getBitMask():
error C2143: syntax error : missing ';' before '<'
error C2433: 'Entity::bitset' : 'virtual' not permitted on data declarations
error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
error C2238: unexpected token(s) preceding ';'
There are more similar errors for the next line as well. It seems like bitset isn't getting included but it clearly is? I can't figure out what's going wrong. WinMain.h includes windows.h, and numDefs.h includes nothing.
Using MS Visual C++ 2008.
Declare the bitset as std::bitset<MAX_SPRITE_PIXELS>.
The bitset template is defined in the std:: namespace, so you either need to reference it by it's full name std::bitset or add using namespace std; somewhere before the class declaration.
I think you need to say std::bitset.
Looks like an error in "numDefs.h"