is it possible to make a function execute code from a string on the stack?

Question

#include 

int main(int argc, char** argv)
{
    void (*p) (void);
    /* this obviously won\'t work, but what string could I put in 
       here (if          


        

Answer 1

Sort of, but not really, there is no eval() in c, like in many scripting languages.

However, what you are describing is sort of like a Buffer Overflow exploit.

Where, you use a string to write "code" (not c syntax, but machine code) into the address space after the buffer. Here's a nice little tutorial of the topic.

Don't use this information to write a virus :(