I'm trying to run an structure that one of the atributes is another structure, but I keep getting the error "does not name a type" and I'm not sure how to solve it.
Palabra.c
#include "palabra.h"
#include <stdlib.h>
struct nodoPalabra{
Cadena contenido;
nodoPalabra* sigPal;
};
Palabra.h
#ifndef PALABRA_H
#define PALABRA_H
#include "diccionario.h"
#include "editor.h"
#include "linea.h"
typedef struct nodoPalabra * Palabra;
Linea.c
#include "linea.h"
#include "palabra.h"
#include <stdlib.h>
#include<iostream>
struct nodoLinea{
nodoLinea* sigLin;
Palabra priPalab;
};
Linea.h
#ifndef LINEA_H
#define LINEA_H
#include "editor.h"
#include "diccionario.h"
#include "palabra.h"
typedef struct nodoLinea * Linea;
Editor.h
#ifndef EDITOR_H
#define EDITOR_H
enum _retorno{
OK, ERROR, NO_IMPLEMENTADA
};
typedef enum _retorno TipoRetorno;
typedef unsigned int Posicion;
typedef char* Cadena;
#endif
I might be doing something wrong, but I've tried a lot of ways to solve it and wasn't able to fix it.
The error
Related
This is my main.cpp
#include <iostream>
#include <unordered_map>
#include <string>
#include "myclass.h"
int main(int argc, const char * argv[]) {
any a = myclass::returnthis();
unordered_map<string, any>* hmap = any_cast<unordered_map<string, any>*>(a);
return 0;
}
this is myclass.h
#ifndef myclass_h
#define myclass_h
#include <any>
using namespace std;
class myclass {
public:
static any returnthis();
};
#endif /* myclass_h */
and this is myclass.cpp
#include "myclass.h"
#include <any>
#include <unordered_map>
#include <string>
any myclass::returnthis() {
return new unordered_map<string, any>();
}
Now, any_cast will report bad any cast. I am working on macOS and I have tried Xcode and CLion.
However, if I put the implementation of the function inside the header file, the problem vanishes. Why?
I am writing a weather station for a raspberry. I'm always getting the error message identifier "test" is undefined.
I've already tried to use no external class with a little example and this works perfectly. Now I'm trying to create an object test, but this doesn't work. I am always getting the error message:
E0020 identifier "test" is undefined
main.cpp:
#include <wiringPi.h>
#include <stdio.h>
#include <iostream>
#include <cstring>
#include <errno.h>
#include <stdlib.h>
include "MeasureWeather.h"
int main(void)
{
MeasureWeather test;
while (1)
{
test._setSensorPin(DHT_PIN);
}
return 0;
}
MeasureWeather.h:
#ifndef MeasureWeather
#define MeasureWeather
#include <wiringPi.h>
#include <stdio.h>
#include <iostream>
#include <errno.h>
#include <stdlib.h>
#include <cstring>
class MeasureWeather
{
public:
//setter for sensor pin
void _setSensorPin(uint8_t pin);
private:
uint8_t sensorPin;
};
#endif // !MeasureWeather
MeasureWeather.cpp:
include "MeasureWeather.h"
void MeasureWeather::setSensorPin(uint8_t pin)
{
_sensorPin = pin;
}
I hope somebody can help me with my issue. Thank you!
You have this at the top of your header file, as part of the include guard:
#define MeasureWeather
MeasureWeather is the name of your class. By defining it as a macro, you hide the class name. Thus the line
MeasureWeather test;
expands to
test;
which would be a reference to something called test, not a declaration.
Use a different identifier for your #include guard.
I am trying to compile the source/headers of some software into a static library, but am running into this dll issue. I haven't been able to run it down, and the standard #ifndef/#define _declspec(...) isn't working. I don't have a ton of C++ experience, so I'm probably just missing something important. Any help would be appreciated.
The errors occur on the last 4 lines of the section of source code, but I'm not sure how to fix it.
The header and source are a bit too long for here, but this is the jist:
Header(.h):
#ifdef CONVERSIONDLL_EXPORTS
#define CONVERSIONDLL_API __declspec(dllexport)
#else
#define CONVERSIONDLL_API __declspec(dllimport)
#endif
#ifndef ConversionUtility_h
#define ConversionUtility_h
#include <Config.h>
#include <iostream>
using namespace std;
#include <math.h>
#include <stdio.h>
#include <string>
#include <PropertyFileHandler.h>
#include <GWProperties.h>
#include <PureDataS.h>
#include <PureDataI.h>
class MSR_EXPORT Conversions {
Msr::GWFramework::Component::PropertyFileHandler propertyFileHandler_;
double sea_level_corr_;
public:
double static const PI;
double static const DEGREES_PER_RADIAN;
double static const FEET_PER_METER;
unsigned short static RTCODE_WGS_1984_IDENTITY;
...
Source(.cpp):
#include <CountdownTimer.h>
#include "ConversionUtility.h"
#include <Rotation.h>
#include <MsrConversionErrorException.h>
#include <sstream>
#include <stdlib.h>
#include <ctime>
#include <GWTime.h>
#include <GWManagerDefines.h>
double const Conversions::PI = 3.14159265359; // low precision: atan(1.0)*4;
double const Conversions::DEGREES_PER_RADIAN = 180/PI;
double const Conversions::FEET_PER_METER = 1/0.3048;
unsigned short Conversions::RTCODE_WGS_1984_IDENTITY = 341; // from TENA-TSPI tdl
I have been having a lot of trouble with my headers and making sure everything is declared correctly. First off my files:
//Main.cpp
#include "Item.h"
#include "Warehouse.h"
using namespace std;
int main() {
...
}
//Item.h
#ifndef ITEM_H
#define ITEM_H
#include <string>
using namespace std;
class Item {
...
};
#endif /* ITEM_H */
//Item.cpp
#include "Item.h"
//Warehouse.h
#define WAREHOUSE_H
#ifndef ITEM_H
#define ITEM_H
using namespace std;
class Item;
class Warehouse {
...
private:
Item* array; //problem starts with this
};
#endif /* WAREHOUSE_H */
//Warehouse.cpp
#include "Warehouse.h"
#include "Item.h"
Warehouse::Warehouse() {
array = new Item[arraySize]; //and this is where I get the error
}
I am pretty sure the problem has to do with my header in Warehouse.h but every combination I try does not work. Sorry if not enough of the code is posted but I figure the problem is with the includes and declarations.
Thanks ahead of time.
edit: to clarify this is not in one file. I just wrote it like this to simplify things. Each one of the above is a separate file.
Your include guards in the header file Warehouse.h are not correct.
Instead of
//Warehouse.h
#define WAREHOUSE_H
#ifndef ITEM_H
#define ITEM_H
using namespace std;
// ...
#endif /* WAREHOUSE_H */
you want
//Warehouse.h
#ifndef WAREHOUSE_H
#define WAREHOUSE_H
using namespace std;
// ...
#endif /* WAREHOUSE_H */
With the current version the class definition in item.h is never included in Warehouse.cpp because the mixed-up include guards in Warehouse.h prevent item.h to be read due to the order of
//Warehouse.cpp
#include "Warehouse.h"
#include "Item.h" //Warehouse.cpp
#include "Warehouse.h"
#include "Item.h"
Then the compiler does not know the definition of Item at that point, hence the error.
Another thing: Do not form the habit of using namespace std in header files. This will lead to issues at some point.
Problem is not in this declaration
private:
Item* array; //problem starts with this
You may define a pointer to an incomplete type.
I think the problem is in a statement where you try to allocate an object for this pointer using operator new or to dereference the pointer.
Also I do not see any reason why you do not want to include header Item.h in header Warehouse.h instead of using elaborated name
class Item;
I wrote a program that works without problems, but the thing I am afraid of is that I get a lot of warnings, when I compile it with -Wall option ( it's program written in C and C++). Actually there is only one type of warning, but occurs many times : Multiple definition of .... ( contructors , destructors, and functions ). I thought I did it correcly, but obviously I am wrong. I have 9 files:
Server.h
Server.cpp - implements methods declared in Server.h
RankingCreator.h
RankingCreator.cpp - implements methods declared in RankingCreator.h
Parser.h
Parser.cpp - implements methods declared in Parser.h
PageHandler.h
PageHandler.cpp - implements methods declared in PageHandler.h
and
Main.cpp
- all header files are included in this file, because I use and combine
functionality of all classes here
Each .cpp file except Main.cpp contains only one corresponding .h file included, for instance Server.cpp contains #include "server.h" and no more .h/.cpp files listed above ( but it does contain headers like stdio.h and string.h ). I can post whole warning message here and code of classes, but the lenght of error is about 50 lines, and all classes would be about 1000 lines, so tell me if it is really needed to solve this. Any idea how to solve this? Do I have to make every function inline or something? Every header file has #if def block at the beginning.
EDIT:
Here is the warning log :
g++ LearnTidyCurl.cpp MyParser.cpp PageHandler.cpp RankingCreator.cpp Server.cpp -lcurl -ltidy -o -Wall Wynik
Here is code of one of my header files, see the way of ifdefs :
#ifndef RANKINGCREATOR_H_
#define RANKINGCREATOR_H_
#include <stdio.h>
#include <iostream>
#include <string.h>
#include <vector>
#include <algorithm>
//using namespace std;
struct rankingElement {
std::string url;
int rank;
bool operator() (rankingElement i, rankingElement j) { return (i.rank > j.rank);}
} ;
bool operator==(const rankingElement& elem, const std::string& url);
class RankingCreator {
public:
rankingElement compareRankingElements;
const static int MAX_QUERY_RESULT_SIZE = 20;
RankingCreator();
virtual ~RankingCreator();
bool checkPageRank( rankingElement rElement, std::vector<rankingElement> &ranking );
void insertIntoRanking( rankingElement rElement, std::vector<rankingElement>& ranking);
};
#endif /* RANKINGCREATOR_H_ */
I threw warning message out, because it makes this topic unreadable.
Btw. I use include guards auto-generated by Eclipse - shouldn't they be just fine? ( When creating a new class they are automatically created )
EDIT:
You can download gedit file with error log here :
http://www4.zippyshare.com/v/62324366/file.html
I didn't want to post 105-lined error here and in addition it is in crap format, so would not good look here.
Server.h :
#ifndef SERVER_H_
#define SERVER_H_
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <sys/select.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <iostream>
#include <sstream>
#include <vector>
...body...
#endif /* SERVER_H_ */
PageHandler.h
#ifndef PAGEHANDLER_H_
#define PAGEHANDLER_H_
#include <tidy.h>
#include <buffio.h>
#include <stdio.h>
#include <errno.h>
#include <iostream>
#include <string.h>
#include <curl/curl.h>
#include <vector>
#include <algorithm>
#include <stdexcept>
... body ...
#endif /* PAGEHANDLER_H_ */
MyParser.h
#ifndef MYPARSER_H_
#define MYPARSER_H_
#include <vector>
#include <iostream>
#include <stdio.h>
#include <string.h>
#include <sstream>
#include <algorithm>
#include <queue>
#include <stdlib.h>
...body...
#endif /* MYPARSER_H_ */
Main.cpp
#include <stdio.h>
#include <iostream>
#include <queue>
#include "MyParser.h"
#include "PageHandler.h"
#include "RankingCreator.h"
#include "Server.h"
#define NO_ERROR 0
std::string convertIntToString(int input) {
std::ostringstream ss;
ss << input;
std::string tmpStr = ss.str();
return tmpStr;
}
int main(int argc, char **argv) {
... body ...
return 0;
}
MyParser.cpp
#include "MyParser.h"
PageHandler.cpp
#include "PageHandler.h"
Server.cpp
#include "Server.h"
RankingCreator.cpp
#include "RankingCreator.h"
Change your inclusion guards:
#ifndef FILENAME_H
#define FILENAME_H
//Code
#endif
And I bet your problem goes away. Obviously make sure each FILENAME_H is unique :) And remember - each header needs this around all it's code, but it shouldn't be in your source files.
Write your header files the following way:
#ifndef SERVER_H
#define SERVER_H
//...
#endif
They are called #include guards to avoid double inclusion problems. Read about them here
If you are ever developing on MVSC++, you can use #pragma once as a first line of each header, but the first solution is portable on every platform.