save project

diy2.py

+i=20
+username = "liuzetong200@outlook.com"
+userpassword = "ZLjd211#"
+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("用户名不存在")
+            print("你还有无数次机会，请放心尝试"+str(i))    
+            continue
+        if password != userpassword:
+            print("密码错误!请重新输入")
+            print("您的机会已用光，请不要再小心被制裁")
+    else:
+        print("账户已冻结，请重新再注册账号，此账号已无法使用")
+        exit()
+print("欢迎来到贝尔编程!")