from ctypes import *
libc = cdll.msvcrt
qsort = libc.qsort
qsort.restype = None

def py_cmp_func(a, b):
  print ("py_cmp_func", a[0], b[0], a[0] - b[0])
  return a[0] - b[0]
  
print ("Integer Array")
IntArray5 = c_int * 5
ia = IntArray5(5, 1, 7, 33, 19)
for i in range(len(ia)): print(ia[i])
CMPFUNC = CFUNCTYPE(c_int, POINTER(c_int), POINTER(c_int))
cmp_func = CMPFUNC(py_cmp_func)
qsort(ia, len(ia), sizeof(c_int), cmp_func)
for i in range(len(ia)): print(ia[i])

print("")
print ("Double Array")
DblArray5 = c_double * 5
da = DblArray5(5, 1.2, 7, 33, 19)
for i in range(len(da)): print(da[i])
CMPFUNC = CFUNCTYPE(c_double, POINTER(c_double), POINTER(c_double))
cmp_func = CMPFUNC(py_cmp_func)
qsort(da, len(da), sizeof(c_double), cmp_func)
for i in range(len(da)): print(da[i])