array of pointers to functions

[jacek]

Do these functions have the same number and types of parameters?

[moowy]

hmm... This is a set of system function or system calls:
one function is printf, the other is something else so I think that they have different set of parameters...
I have to do the same thing that the operating system uses to make a system call. It calls a function in the array accordingly to a specified address in the array.
example:
printf has some specified address in the array and it automatically calls that addres when needed. My programme has to call that function if I specify the same address in the array but I have to do that explicitly ( I have to perform the call of that function accordingly to the specified position in the array).

[wysota]

Remember that you won't be allowed to do some things which the kernel is allowed to do. In your situation I would use a switch() block to handle each call separately. You'll probably have to map all the arguments to some generic type like void* before entering the switch() and then remap them to proper types when calling the methods. If you were using Qt, I'd tell you to use QMetaObject::invokeMethod(), but I guess you don't use Qt