function-pointers

I have been trying to understand function pointers in C++ so that I can successfully use them in one of my projects. I am running into a logic problem though. Say we have two classes: a parent class and a child class which inherits the parent class. class Parent{ ...other stuff void (Parent::*ptr2func) (); ...other stuff }; Then we have a child class: class Child : public Parent{ ...other stuff void afunc(); ...other stuff }; I wanted to connect the pointer of the parent class to the afunc() function of the child class. In the constructor of the child class is where I tried to do it like so:

I want to use a library (nlopt) that has a function set_min_objective which takes a pointer to a numerical function myfunc and find its minimum. I would like to create a class that will contain a suitably initialized member function. set_min_objective would then find an optimum in a specific instance (myP in the example below). The call sequence is: opt.set_min_objective(myfunc, NULL); and I would like to use something like: opt.set_min_objective(myP.f, NULL); the error I get when compiling this is: main.cpp: In function 'int main()': main.cpp:79:34: error: no matching function for call to

Even though I fear that you will tell me that this topic was covered several time, I dare to ask it, since I was not able to generate a solution. Probably I was just looking for the wrong thing... Assume that I have a function which receives a "mode" from some external function. Depending on the mode, the function will call different member functions of the same object. This works well for me with member function without any argument, but I did not find out how to extend it to members with arguments. In the real world application, the arguments are not int/float but a more complex classes and

I have a DLL that is written in C++ that includes exported function that has a function pointers to be used as callback function. // C++ DllExport unsigned int DllFunctionPointer( unsigned int i, unsigned int (*TimesThree)( unsigned int number ) ) { return TimesThree( i ) ; } I have a CSharp application that I would like to use to invoke the DLL functions. // C# public unsafe delegate System.UInt32 CallBack( System.UInt32 number ); class Program { [DllImport("SimpleDLL.dll")] public static extern System.UInt32 DllFunctionPointer( System.UInt32 i, CallBack cb) ; static unsafe void Main(string[]

I am looking for a way to call different functions by a string input. I have a map that ties each unique string to a function pointer and a lookup function to search the map and return a pointer if found. Now the trick is, I need a way to store and return pointers to functions with at least different return types, if possible, also with different signatures. The usage would be: Get a string input from a network socket -> find and execute the found function -> shove the result straight back into the socket to be serialized and sent, not caring what actually happened. Is this doable? If not, how