python《信息安全专业导论》期末考试内容（三）

f = open("20201212.txt", "w")
f.write ("20201212")

f=open("20201212.txt","r")
print(f.read())
f.close()

f=open("20201212.txt","r")
n=f.read()
a=0
for i in n:
    a=a+int(i)
print(a)
b=bin(a)
print(b)
f=open("20201212b.txt","w")
f.write(b)
f.close()