[zokemon]

You guys must not realize that this:
for (i = 0; i < j; i++) {
func();
}
is simply:
i = 0;
while (i < j) {
func();
i++;
}

Also, checking every single letters seems to be A LOT of work. Much more effcient if you just found the first position of "@" and just moved like such. Hell, you could even tokenize("@") the whole thing and just do a for loop through the tokens (changing the mode of "variable" or "text" on every other token).