Complete newfag here

Hai, I'm a newfag to C++ and to this board so excuse my giant amount of fail.
Why won't this figure out the smallest thing in the array?
http://codepad.org/vaHOX8mW


CL-USER> (defun minimum (list) (loop for x in list minimize x))
MINIMUM
CL-USER> (minimum '(9 10 9.4 0.01 0.001))
0.001