How can I convert string to code at run time

Question

I am generating strings containing if else expressions. I was wondering if I can execute this expressions at run time? Here's an example:

string s = "if(x > 10) {Fly = true;} else {Fly = False;}";
Execute (s); 

Is it even possible to do this?

Answer 1

It is possible to use TCC ( http://bellard.org/tcc/ ). It allows to compile and run code natively at runtime. Another approach is to use an interpreter, there are plenty out there (LUA, Python etc, see list wiki).

Answer 2

One does not simply interpret C/C++ code... AFAIK you just can't.
(except if you compile another binary and run it from cmd line maybe...)

Note: You can write

fly = (x > 10);

instead of

if(x > 10){
    fly = true;
}else{
    fly = false;
}

Answer 3

No. C++ is a compiled language and has no eval-function or the-like. You may want to include a scripting engine into your program, like Lua