Hello, I decided to play a bit with templates and classes, but
discovered some problems.
So, I have 3 files: LinkedList.h LinkedList.cpp and test.cpp (by the
way it is not finished fully)
LinkedList.h
#ifndef LinkedList_byDavid
#define LinkedList_byDavid
template <class lType>
class LinkedList {
public:
LinkedList() : lSize(0) {};
void add(lType item);
lType get(int num) const;
int Size() const;
//~LinkedList();
private:
typedef struct child {
lType *value;
child *next;
} child;
child *root;
int lSize;
};
#endif
LinkedList.cpp
#include <cstring>
#include "LinkedList.h"
template <class lType>
int LinkedList<lType>::Size() const {
return lSize;
}
template <class lType>
void LinkedList<lType>::add(lType item) {
child *newChild = new child;
newChild->value = new lType;
newChild->value = item;
newChild->next = root;
root = newChild;
lSize++;
}
and test.cpp:
#include <iostream>
#include <cstring>
#include "LinkedList.h"
using namespace std;
int main (int argc, char const *argv[])
{
cout << "Bandymas" << endl;
LinkedList<intas;
LinkedList<int*tu = new LinkedList<int>();
as.add(5);
as.add(5);
as.add(5);
as.add(5);
as.add(5);
int kazkas = as.Size();
cout << "dydis: " << kazkas << endl;
cout << (*tu).Size() << endl;
return 0;
}
I use this to compile and link:
g++ -Wall -ansi -pedantic -c LinkedList.cpp
g++ -Wall -ansi -pedantic -c test.cpp
g++ -o test test.o linkedlist.o
And getting:
Undefined symbols:
"LinkedList<int>::add(int)", referenced from:
_main in test.o
_main in test.o
_main in test.o
_main in test.o
_main in test.o
"LinkedList<int>::Size() const", referenced from:
_main in test.o
_main in test.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
on gcc version 4.0.1 (Apple Inc. build 5465)
There could be two problems:
a) declarations does not match, but as I look it looks that everything
is okay.
b) something wrong with LinkedList.cpp, maybe I missed something.
Any tips what I have missed here?
