Is it possible to create a function dynamically, during runtime in C++?

Yes, of course, without any tools mentioned in the other answers, but simply using the C++ compiler.

just follow these steps from within your C++ program (on linux, but must be similar on other OS)

  1. write a C++ program into a file (e.g. in /tmp/prog.cc), using an ofstream
  2. compile the program via system("c++ /tmp/prog.cc -o /tmp/prog.so -shared -fPIC");
  3. load the program dynamically, e.g. using dlopen()

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