Help needed on "no match function error"

[Jolie Chen]

I am learning template programming now, and I wrote the following code

#include <iostream>
#include "Queue.h"
using namespace std;

template <typename Tclass QueueItem
{
public:
QueueItem(T item):value(ite m),next(0){}
T value;
QueueItem *next;
};

template <typename Tclass Queue
{
private:
QueueItem<T*hea d;
QueueItem<T*tai l;
public:
Queue():head(0) ,tail(0){}
Queue(const Queue &orig):head(0), tail(0)
{
for(QueueItem<T *temp=orig.head ;temp;temp=temp->next)
{
push(temp->value);
}

}
Queue& operator=(Queue & orig)
{
head =0;
tail =0;
for(QueueItem<T *temp=orig.head ;temp;temp=temp->next)
{
push(temp->value);
}
return *this;
}
~Queue()
{
while (head)
{
cout<<"In~Queue ";
pop();
}
}
void pop();
void push(T item);
bool empty(){
if (head==0)
return 1;
return 0;
}

};

template <typename Tvoid Queue<T>::push( T item)
{
if(empty())
{
head = new QueueItem<T>(it em);
tail=head;
}
else
{
QueueItem<T*tem p;
temp = new QueueItem<T>(it em);
tail->next=temp;
tail=temp;
}
}

template <typename Tvoid Queue<T>::pop()
{
if(!empty())
{
QueueItem<T*tem p;
temp=head;
head = head->next;
cout<< "pop a value of "<<temp->value<<endl;
delete temp;
}
else
{
cerr<<"the Queue is empty, so cannot call pop function"<<endl ;
}
}

int main()
{
Queue<intorig_q ueue;
for(int i=0; i<8; i++)
orig_queue.push (i);

Queue<intcopy_q ueue;
copy_queue(orig _queue);//this line has compile error
return 0;
}

and get the compiling error :
no match for call to ‘(Queue<int>) (Queue<int>&)’ Queue Queue.cc line
103 1214317008414 99

for the line copy_queue(orig _queue): line

Could you please help me out for this problem? Thanks

[Victor Bazarov]

Jolie Chen wrote:

I am learning template programming now, and I wrote the following code

#include <iostream>
#include "Queue.h"
using namespace std;

template <typename Tclass QueueItem
{
public:
QueueItem(T item):value(ite m),next(0){}
T value;
QueueItem *next;
};

template <typename Tclass Queue
{
private:
QueueItem<T*hea d;
QueueItem<T*tai l;
public:
Queue():head(0) ,tail(0){}
Queue(const Queue &orig):head(0), tail(0)
{
for(QueueItem<T *temp=orig.head ;temp;temp=temp->next)
{
push(temp->value);
}

}
Queue& operator=(Queue & orig)
{
head =0;
tail =0;
for(QueueItem<T *temp=orig.head ;temp;temp=temp->next)
{
push(temp->value);
}
return *this;
}
~Queue()
{
while (head)
{
cout<<"In~Queue ";
pop();
}
}
void pop();
void push(T item);
bool empty(){
if (head==0)
return 1;
return 0;
}

};

template <typename Tvoid Queue<T>::push( T item)
{
if(empty())
{
head = new QueueItem<T>(it em);
tail=head;
}
else
{
QueueItem<T*tem p;
temp = new QueueItem<T>(it em);
tail->next=temp;
tail=temp;
}
}

template <typename Tvoid Queue<T>::pop()
{
if(!empty())
{
QueueItem<T*tem p;
temp=head;
head = head->next;
cout<< "pop a value of "<<temp->value<<endl;
delete temp;
}
else
{
cerr<<"the Queue is empty, so cannot call pop function"<<endl ;
}
}

int main()
{
Queue<intorig_q ueue;
for(int i=0; i<8; i++)
orig_queue.push (i);

Queue<intcopy_q ueue;
copy_queue(orig _queue);//this line has compile error

This syntax actually means to invoke the [non-existent] operator() for
the object called 'copy_queue' with 'orig_queue' as argument. Did you
actually mean to do

Queue<intcopy_q ueue(orig_queue );

?

return 0;
}

and get the compiling error :
no match for call to ‘(Queue<int>) (Queue<int>&)’ Queue Queue.cc line
103 1214317008414 99

for the line copy_queue(orig _queue): line

Could you please help me out for this problem? Thanks

V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask

[Jolie Chen]

Victor,

You are right. Thank you so much.

Jolie

On Jun 24, 9:48*am, Victor Bazarov <v.Abaza...@com Acast.netwrote:

Jolie Chen wrote:

I am learning template programming now, and I wrote the following code

#include <iostream>
#include "Queue.h"
using namespace std;

template <typename Tclass QueueItem
{
public:
* *QueueItem(T item):value(ite m),next(0){}
* *T value;
* *QueueItem *next;
};

template <typename Tclass Queue
{
private:
* *QueueItem<T*he ad;
* *QueueItem<T*ta il;
public:
* *Queue():head(0 ),tail(0){}
* *Queue(const Queue &orig):head(0), tail(0)
* *{
* * * * * *for(QueueItem< T*temp=orig.hea d;temp;temp=tem p->next)
* * * * * *{
* * * * * * * * * *push(temp->value);
* * * * * *}

* *}
* *Queue& operator=(Queue & orig)
* *{
* * * * * *head =0;
* * * * * *tail =0;
* * * * * *for(QueueItem< T*temp=orig.hea d;temp;temp=tem p->next)
* * * * * *{
* * * * * * * * * *push(temp->value);
* * * * * *}
* * * * * *return *this;
* *}

* *~Queue()
* *{
* * * * * *while (head)
* * * * * *{
* * * * * * * * * *cout<<"In~Queu e";
* * * * * * * * * *pop();
* * * * * * * * * *}
* *}
* *void pop();
* *void push(T item);
* *bool empty(){
* * * * * *if (head==0)
* * * * * * * * * *return 1;
* * * * * *return 0;
* *}

};

template <typename Tvoid Queue<T>::push( T item)
{
* *if(empty())
* *{
* * * * * *head = new QueueItem<T>(it em);
* * * * * *tail=head;
* *}
* *else
* *{
* * * * * *QueueItem<T*te mp;
* * * * * *temp = new QueueItem<T>(it em);
* * * * * *tail->next=temp;
* * * * * *tail=temp;
* *}
}

template <typename Tvoid Queue<T>::pop()
{
* *if(!empty())
* *{
* * * * * *QueueItem<T*te mp;
* * * * * *temp=head;
* * * * * *head = head->next;
* * * * * *cout<< "pop a value of "<<temp->value<<endl;
* * * * * *delete temp;
* *}
* *else
* *{
* * * * * *cerr<<"the Queue is empty, so cannot call pop function"<<endl ;
* *}
}

int main()
{
* *Queue<intorig_ queue;
* *for(int i=0; i<8; i++)
* * * * * *orig_queue.pus h(i);

* *Queue<intcopy_ queue;
* *copy_queue(ori g_queue);//this line has compile error

This syntax actually means to invoke the [non-existent] operator() for
the object called 'copy_queue' with 'orig_queue' as argument. *Did you
actually mean to do

* * *Queue<intcopy_ queue(orig_queu e);

?

* *return 0;
}

and get the compiling error :
no match for call to ‘(Queue<int>) (Queue<int>&)’ * * *Queue * Queue.cc * * * *line
103 * * * *1214317008414 * 99

for the line copy_queue(orig _queue): line

Could you please help me out for this problem? Thanks

V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask