Cannot call base function

[none]

I have the following:

class Base {
public:
void test();

};

class Sub : public Base {
public:



};



int main() {

Sub sub;
sub.test();


return 0;

}

which gives this error:


main.cpp.text+0xa): undefined reference to `Base::test()'
collect2: ld returned 1 exit status
make[2]: *** [rus] Error 1
make[1]: *** [CMakeFiles/rus.dir/all] Error 2
make: *** [all] Error 2



Why is it not possible to call the base function test() on the sub instance?

 

[Martijn van Buul]

* none:

I have the following:

class Base {
public:
void test();

};

class Sub : public Base {
public:



};



int main() {

Sub sub;
sub.test();


return 0;

}

And where is your Base::test() ?

which gives this error:


main.cpp.text+0xa): undefined reference to `Base::test()'
collect2: ld returned 1 exit status

You never *defined* Base::test(), you merely declared it. Note that this
is not an error from the compiler, but from the linker; since you didn't
write any code for Base::test(), the linker obviously can't find it.