the main.cpp:

#include <stdlib.h>
#include <iostream>
#include <stdio.h>
#include <string.h>

#include "testme.h"

using namespace std;

int main() {

testme *test = new testme(5);

test->modify(3);

cout << test->getVar();

}

-----------------------------------

the testme.cpp:

class testme
{
private: int var;

public:
testme() {
var = 0;
}
testme(int i) {
var = i;
}
void modify(int i) {
var = i;
}
int getVar() {
return var;
}
};

------------------------------

the testme.h :

#ifndef testme_H
#define tesme_H

class testme
{
private: int var;

public:
testme();
testme(int i);
void modify(int i);
int getVar();
};

#endif
------------------------------------------

and the Makefile :

testfile : main.o testme.o
g++ main.o testme.o -o testfile

main.o : main.cpp testme.h
g++ -c main.cpp
testme.o : testme.cpp
g++ -c testme.cpp

clean : rm main.o testme.o

--------------------------------------------
aber es funktioniert nicht.. beim binden am ende kommt folgende Fehlermeldung:

g++ main.o testme.o -o testfile
main.o(.text+0x2d): In function main': : undefined reference totestme::testme(int)'
main.o(.text+0x73): In function main': : undefined reference totestme::modify(int)'
main.o(.text+0x84): In function main': : undefined reference totestme::getVar()'
collect2: ld returned 1 exit status
make: *** [testfile] Error 1

warum??

vielen danke schonmal