摸个鱼。。。
def bin1(num):
if num==0:
return 0
if num==1:
return 1
a = num // 2
b = num % 2
return bin1(a)+bin1(b)
arr = range(0, 20)
for i in arr:
a = f'{i:3d}'
b = f'{i:08b}'
def count1(bb):
cnt = 0
for ch in bb:
if ch == '1':
cnt+=1
return cnt
c = count1(b)
d = bin1(i)
print(f'{a} : {b} = {c:3d} {"<-->" if c==d else "<xx>"} {d:2d}')
