十进制转二进制
#!/usr/bin/python
# -*- coding: UTF-8 -*-
denum = input("输入十进制数:")
print denum,"(10)",
binnum =[]
# 二进制数
while denum >0:
binnum.append(str(denum %2))# 栈压入
denum //= 2
print'= ',
while len(binnum)>0:
import sys
sys.stdout.write(binnum.pop())# 无空格输出print ' (2)'
