save project

diy2.py

-username = "python"
-userpassword = "123456"
+username="python"
+userpassword="666666"
 while True:
-    name = input("请输入用户名:")
-    password = input("请输入密码:")
-    if name == username and password == userpassword:
+    name=input("请输入用户名:")
+    password=input("请输入密码:")
+    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")
+        break
+    if name!=username:
+        print("用户名不存在,请重新输入")
+    if password!=userpassword:
+        print("密码输入有误,请重新输入")
 print("欢迎来到贝尔编程!")
+    
\ No newline at end of file