save project

diy2.py

+username = "mango"
+userpassword = "123456"
+i=3
+while True:
+   if i>0:
+      name = input("请输入用户名:")
+      password = input("请输入密码:")
+      i-=1
+      if name == username and password == userpassword:
+         print("登录成功!")
+         break
+      if name != username:
+         print("请再输入名字")
+         print("提示:您还有"+str(i)+"机会")
+      if password != userpassword:
+         print("请再输入密码")
+         print("提示:您还有"+str(i)+"机会")
+   else:
+      print("锁了")
+      exit()
+print("欢迎来到贝尔编程!")