Ways to show your co-programmers that some methods are not yet implemented in a class when programming in C++

Question

What approaches can you use when:

• you work with several (e.g. 1-3) other programmers over a small C++ project, you use a single repository
• you create a class,

Answer 1

Declare it. Dont implemented it. When the programmer use to call the unimplemented part of code linker complains, which is the clear hit to the programmer.

class myClass
{
    int i;
public:
    void print(); //NOt yet implemented
    void display()
    {
        cout<<"I am implemented"<