第五次高级编程作业

alien_color = 'green';
if alien_color == 'green':
print('you get five point');
alien_color = 'red';
if alien_color == 'green':
print('you get five point');

alien_color = 'green';
if alien_color == 'green':
print('you get five point');
elif alien_color == 'yellow':
print('you get ten point');
else:
print('you get fifteen point');
alien_color = 'yellow';
if alien_color == 'green':
print('you get five point');
elif alien_color == 'yellow':
print('you get ten point');
else:
print('you get fifteen point');
alien_color = 'red';
if alien_color == 'green':
print('you get five point');
elif alien_color == 'yellow':
print('you get ten point');
else:
print('you get fifteen point');

favorite_fruits = ['apple' , 'banana' , 'grape'];
if 'watermelon' in favorite_fruits:
print('you really like watermelon');
if 'apple' in favorite_fruits:
print('you really like watermelon');
if 'peach' in favorite_fruits:
print('you really like peach');
if 'grape' in favorite_fruits:
print('you really like grape');
if 'mango' in favorite_fruits:
print('you really like mango');

current_users = ['Pat' , 'Luna' , 'Tom' , 'Coco' , 'Jack'];
new_users = ['Kitty', 'Gakki','Tom', 'Sony' , 'Coco'];
for new_user in new_users:
if new_user in current_users:
print("Name " + new_user + " has been used, please use another user name!" );
else:
print("This name has not been used.");