Need some help with "self modifying code" in C++

Hello... Maybe what Im asking isnt very hard, but I really dont know because I never did it before... Anyway heres what I want:

Im learning Assembly right now and with Assembly its very easy to write machine code in some memory location while the application is actually running and then call it using a jmp instruction. So, as Im much more familiar with C++ and like it better, Im trying to think of some way to do something like that(if it is possible) using C or C++... Basically writing machine code to memory and then call it... Is there any way of doing this in C++, or will I have to use Assembly to do this?

And of course I'll not try to write a whole program in machine code straight to memory and then call it.. I Just wanna know if it is possible or not...

The only way to write self-modifying code in C or C++ is to do something outside scope of the standards. The obvious way is by embedding assembler, which is inherently non-portable.

Keep in mind that self-modifying executables are, more often than not, considered symptomatic of a virus. Whatever it is you're trying to achieve, better to find an approach that is more likely to be considered legitimate.

Putting some executable somewhere in memory and jumping to it is self modifying?

I don't think so. You can allocate some memory, put some code and jump to it with C/C++ anytime you like. Like when OS loads an executable.

Yes it's possible. Read about "The Welder" in "Pixomatic 2".