save project

diy2.py

@@ -4,6 +4,11 @@ while True:
     name = input("请输入用户名:")
     name = input("请输入用户名:")
     password = input("请输入密码:")
     password = input("请输入密码:")
     if name == username and password == userpassword:
     if name == username and password == userpassword:
-        print("登录成功!")
-    print("用户名和密码错误!请重新输入")
+        print('登录成功')
+        break
+    print('用户名密码错误!请重新输入')
+    if name != username:
+        print('用户名错误')
+    if password != userpassword:
+        print('密码错误')
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
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