# coding: utf-8
"""
    @author: zhangjk
    @file: 17.py
    @date: 2020-03-10
    说明：xxxx
"""

# 编译原理
# 微机原理
# 语言解释器


def f1():
    print('a')

def f2():
    for i in range(9,-1,-1):
        print(i)




def main():
    f2()



if __name__ == '__main__':
    main()
