save project

diy2.py

@@ -3,8 +3,11 @@ userpassword = "123456"
 while True:
     name = input("请输入用户名:")
     password = input("请输入密码:")
-    if name == username and password == userpassword:
+    if name == username and password ==userpassword :
         print("登录成功!"）
         break
-    print("用户名和密码错误!请重新输入")
+    if name ！= username
+        print("用户名不存在，请从新输入")
+    if password ！= userpassword
+        print("密码有误，请从新输入")
 print("欢迎来到贝尔编程!")
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