C++

Forum

 
undefined reference to - error

Zoefschildpad (25)
My code seems to give a number of "undefined reference to" errors.
Here's the code:

main.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
 
#include <iostream>
#include "stack1.h"

using namespace std;

int main(){
 int k;
 stack<int> x;
 x.push(1);
 x.push(7);
 x.pop(k);
 cout << k;
 return 0;
}


stack.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
#ifndef __stack1_h__
#define __stack1_h__
using namespace std;

const int MAX = 100;

template <class T>
class stack{
 public: 
   stack();
   ~stack();
   bool pop(T&);
   bool push(T);
   bool full();
   bool empty();
 private:
   T stackitems[MAX];
   int stacksize;
};
#endif


stack.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
 
#include "stack1.h"

using namespace std;

template <class T>
stack<T>::stack(){
 stacksize = -1;
}

template <class T>
bool stack<T>::pop(T& item){
 if (!empty()){
   item = stackitems[stacksize];
   stacksize--;
   return true;
 }
return false;
}

template <class T>
bool stack<T>::push(T item){
 if (!full()){
   stacksize++;
   stackitems[stacksize] = item;
   return true;
 }
 return false;
}

template <class T>
bool stack<T>::full(){
 if(stacksize+1==MAX){
   return true;
 }
 return false;
}

template <class T>
bool stack<T>::empty(){
 if (stacksize < 0){
   return true;
 }
 return false;
}

the errors I get are:
1
2
3
4
5
6
 
<snip>/main.cc:8: undefined reference to `stack<int>::stack()'
<snip>/main.cc:9: undefined reference to `stack<int>::push(int)'
<snip>/main.cc:10: undefined reference to `stack<int>::push(int)'
<snip>/main.cc:11: undefined reference to `stack<int>::pop(int&)'
<snip>/main.cc:13: undefined reference to `stack<int>::~stack()'
<snip>/main.cc:13: undefined reference to `stack<int>::~stack()'


compiled with g++, makefile made using qmake.

Can anyone tell me why I'm getting these errors?
moorecm (1932)
This should be a sticky, the same problem comes up daily on here.

See 4th post:
http://www.cplusplus.com/forum/general/24848/
Last edited on
Zoefschildpad (25)
That worked, thanks.

I used at least 3 different tutorials for template classes, you'd think one of them would mention it...
Topic archived. No new replies allowed.