全加器的完整真值表

运行下面这段程序，填写它打印出来的结果。

def half_adder(a, b):
    return a ^ b, a & b

def full_adder(a, b, cin):
    s1, c1 = half_adder(a, b)
    s2, c2 = half_adder(s1, cin)
    return s2, c1 | c2

ss = ""
cc = ""
for a in (0, 1):
    for b in (0, 1):
        for cin in (0, 1):
            s, c = full_adder(a, b, cin)
            ss = ss + str(s)
            cc = cc + str(c)
print(ss + "/" + cc)