C halps

How do I check what type of variable a variable is?

Something like;
if (typecheck(foo,int))
  {
  /* lol */
  }

>>1
Just cast it to an int and check if it's a valid value, e.g. for a pointer:

if (INT_MIN <= *(*int)foo <= INT_MAX) {
        /* *foo points to an int */
}
Your coding style is horrible, by the way. You really should see an orthodontist about those misplaced braces.