1 #作业
 2 # 作业：
 3 # 用户输入数字0-100
 4 # 程序判断:
 5 # 数字>90，成绩为A
 6 # 数字>80，成绩为B
 7 # 数字>70，成绩为C
 8 # 数字<60，成绩为D
 9 # 尝试用函数完成？
10 
11 def score(name):
12     print("welcome to %s".center(50,"-")%(name.upper()))
13 
14     while True:
15         choice = input("please your input score or exit q : ")
16 
17         if choice == "q": exit()
18         if choice.isdigit():
19             choice = int(choice)
20             if choice > 100:
21                 print("请输入0-100以内的数字")
22                 continue
23             if choice == 100:
24                 print("%s score is Full Score\n" %(name))
25             elif choice >= 90:
26                 print("%s score is A\n"%name)
27             elif choice >= 80:
28                 print("%s score is B\n"%name)
29             elif choice >= 60:
30                 print("%s score is C\n"%name)
31             else:
32                 print("%s score is D\n"%name)
33 
34 
35         else:
36             print("请输入0-100以内的数字")
37             continue
38 
39 name = input("please your input name: ")
40 score(name)