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i need some help plz.. check the error in my pro

eng soso (20)
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#include<iostream>
using namespace std;
typedef int errorcode;
#define success 0
#define underflow -1
#define overflow -2
template <class T>

class node{

public:T data;node * next;

	   node(){data=0;next=NULL;};
	   
	   node(T x){data =x;next=NULL;}

};

template <class T>

class Q{ 

protected:node * rear ;node * front;
		  int count;
public:Q();
	   ~Q();
	   errorcode append(T item);
	   errorcode retrieve(T & item);
	   errorcode serve();
	   bool isempty();
	   bool isfull(){return false;}
};

template <class T>
Q <T> ::Q(){
	cout<<"in constructer"<<endl;
	count=0;rear=front=NULL;
}

template <class T>
Q <T>::~Q(){
	node *p;
	while(front!=NULL){
		p=front;
		front=front ->next;
		delete p;
	}

template <class T>
errorcode Q <T>  ::append(T item){
	errorcode code = success;

	node * n;
	n=new node;
	n->data=item;
	n->next=NULL;

	if(isempty()){

		rear=front=n;
		count++;
	}

	else{
		rear->next=n
			rear=n;
		
		count++
	}
	return code;}


	template <class T>

	errorcode  Q <T> ::retrieve(T & item){
		errorcode code = success;

		if(isempty()){
			code = underflow;cout<<"empty"<<endl;}

		else{ item=front->data;}

		return code;
	}

template <class T>
	errorcode  Q <T> ::serve(){
		errorcode code =success;

		if(isempty()){code =underflow;cout<<"empty"<<endl;}

		else{
		node *p;
		p=front;
		front=front->next;
		delete p;
		count--;

		}
		return code;
	}

    template <class T>
	bool Q <T>::isempty(){
		if (front==NULL)return true;
		else return false;

	}

    template <class T>

	class exQ::public Q{

	public: int size();
			void clear();
			errorcode serve&retrieve(T & item);
			exQ();
	}

    template <class T>
		exQ <T>::exQ();
    template <class T>
		int exQ <T>::size(){
		return count;
	}

	
    template <class T>
		void exQ <T>::clear(){

		node *p;
		while(front!=NULL){
			p=front;
			front =front->next;
			delete p;}
		rear=NULL:
			count=0;
	}
 template <class T>
	 errorcode exQ <T>::serve&retrieve(T & item){
	 node *p;
	 errorcode code =success;
	 if(isempty()){code=underflow;cout<<"empty"<<endl;}
	 else{
		 item=front->data;
		 p=front;
		 front=front->next;
		 delete p;
		 count--;
	 }
	 return code;
 }


the error

--------------------Configuration: 5 - Win32 Debug--------------------
Compiling...
5.cpp
C:\5\5.cpp(160) : fatal error C1075: end of file found before the left brace '{' at 'C:\5\5.cpp(145)' was matched
Error executing cl.exe.

5.exe - 1 error(s), 0 warning(s)



wtz wrong !!!
Dacster13 (212)
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Q <T>::~Q(){
	node *p;
	while(front!=NULL){
		p=front;
		front=front ->next;
		delete p;
	}


in line 48, the destructor of the Q class is missing a closing bracket.
eng soso (20)
hey Dacster13 ,,
i did wt u told me to do ,, but it get more complicated now,,,,


Compiling...
5.cpp
C:\5\5.cpp(117) : error C2955: 'Q' : use of class template requires template argument list
C:\5\5.cpp(37) : see declaration of 'Q'
C:\5\5.cpp(123) : see reference to class template instantiation 'exQ<T>' being compiled
C:\5\5.cpp(121) : error C2143: syntax error : missing ';' before '&'
C:\5\5.cpp(123) : see reference to class template instantiation 'exQ<T>' being compiled
C:\5\5.cpp(121) : error C2501: 'retrieve' : missing storage-class or type specifiers
C:\5\5.cpp(123) : see reference to class template instantiation 'exQ<T>' being compiled
C:\5\5.cpp(145) : error C2143: syntax error : missing ';' before '&'
C:\5\5.cpp(145) : error C2350: 'exQ<T>::serve' is not a static member
C:\5\5.cpp(145) : error C2059: syntax error : ';'
C:\5\5.cpp(145) : error C2061: syntax error : identifier 'T'
Error executing cl.exe.

5.exe - 7 error(s), 0 warning(s)



i think theres sth wrong with the inhertance coz it's of the kind template
Dacster13 (212)
I just noticed but your code has a lot of syntax errors in it.

line 23:
protected:node * rear ;node * front;

line 42:
node *p;

line 53-54: 
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node * n;
n=new node;


line 93:
node *p;

line 131:
node *p;

node must have an argument type since it's using a template so it needs to be like node<T> *rear and node<T> * front.



line 65:
rear->next=n

line 68:
count++

missing semi-colons.




line 112:
class exQ::public Q{

extra colon




line 116:
errorcode serve&retrieve(T & item);

line 140:
errorcode exQ <T>::serve&retrieve(T & item){

invalid method identifier, the & symbol is a special character and is not allowed to be used in identifiers.



line 118:
}

end of class declaration missing a semi-colon.




line 121:
exQ <T>::exQ();

class constructor missing a body.




line 136:
rear=NULL:

colon used to end statement instead of semi-colon.
Last edited on
eng soso (20)
ur amazing Dacster .. i got no error in the classes & i put <T> to the inheritance is it right ?!

class exQ:public Q<T>

& when i wrote the main to test my programme i got 102 errors !

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int x;
Q <int> r;
r.append(2);
r.append(7);
r.retrieve(x);



my programme
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#include<iostream>
using namespace std;
typedef int errorcode;
#define success 0
#define underflow -1
#define overflow -2
template <class T>

class node{

public:T data;node<T> * next;

	   node(){data=0;next=NULL;};
	   
	   node(T x){data =x;next=NULL;}

};

template <class T>

class Q{ 

protected:node<T> * rear ;node <T>* front;
		  int count;
public:Q();
	   ~Q();
	   errorcode append(T item);
	   errorcode retrieve(T & item);
	   errorcode serve();
	   bool isempty();
	   bool isfull(){return false;}
};

template <class T>
Q <T> ::Q(){
	cout<<"in constructer"<<endl;
	count=0;rear=front=NULL;
}

template <class T>
Q <T>::~Q(){
	node *p;
	while(front!=NULL){
		p=front;
		front=front ->next;
		delete p;}
	}

template <class T>
errorcode Q <T>  ::append(T item){
	errorcode code = success;

	node<T> * n;
	n=new <T>node;
	n->data=item;
	n->next=NULL;

	if(isempty()){

		rear=front=n;
		count++;
	}

	else{
		rear->next=n;
			rear=n;
		
		count++;
	}
	return code;}


	template <class T>

	errorcode  Q <T> ::retrieve(T & item){
		errorcode code = success;

		if(isempty()){
			code = underflow;cout<<"empty"<<endl;}

		else{ item=front->data;}

		return code;
	}

template <class T>
	errorcode  Q <T> ::serve(){
		errorcode code =success;

		if(isempty()){code =underflow;cout<<"empty"<<endl;}

		else{
		node<T> *p;
		p=front;
		front=front->next;
		delete p;
		count--;

		}
		return code;
	}

    template <class T>
	bool Q <T>::isempty(){
		if (front==NULL)return true;
		else return false;

	}

    


	template <class T>

	class exQ:public Q<T> {

	public: int size();
			void clear();
			errorcode serveandretrieve(T &item);
			exQ();
	};

    template <class T>
		exQ <T>::exQ(){cout<<"created by defualt"<<endl};
    template <class T>
		int exQ <T>::size(){
		return count;
	}

	
    template <class T>
		void exQ <T>::clear(){

		node <T>*p;
		while(front!=NULL){
			p=front;
			front =front->next;
			delete p;}
		rear=NULL;
			count=0;
	}
 template <class T>

	 errorcode exQ <T>::serveandretrieve(T &item){
	 node *p;
	 errorcode code =success;
	 if(isempty()){code=underflow;cout<<"empty"<<endl;}
	 else{
		 item=front->data;
		 p=front;
		 front=front->next;
		 delete p;
		 count--;
	 }
	 return code;
 }
 
 int main(){

/*int x;
Q <int> r;
r.append(2);
r.append(7);
r.retrieve(x);*/


	 return 0;
 }
Last edited on
Disch (13742)
The two lingering errors I see are here:

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template <class T>
Q <T>::~Q(){
	node<T> *p;  // must be node<T>, not node.  Remember, node is not a class.  node<T> is the class.
	while(front!=NULL){
		p=front;
		front=front ->next;
		delete p;}
	}

template <class T>
errorcode Q <T>  ::append(T item){
	errorcode code = success;

	node<T> * n;
	n=new node<T>;  // <-  node<T>, not <T>node.
	n->data=item;
eng soso (20)
thanx Disch .. ur the best ever :))
it works ..
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