from lib_std_vector import *
iv = IntVector(4)
for i in range(0,4):
iv[i] = i
x = average(iv)
y = average([1,2,3,4])
a = half([10,10.5,11,11.5])
dv = DoubleVector(10)
for i in range(0,10):
dv[i] = i/2.0
halve_in_place(dv)