save project

diy1.py

@@ -6,7 +6,11 @@ while True:
     password=input("密码")
     password=input("密码")
     if name==username and password==userpassword:
     if name==username and password==userpassword:
         print("登陆成功")
         print("登陆成功")
-        break
+        break    
+    if name != username:
+        print("用户名不存在,请重新输入")
+    if password != userpassword:
+        print("密码不存在,请重新输入")
     else:
     else:
         print("登陆失败")
         print("登陆失败")
 print("欢迎来到贝尔编程")
 print("欢迎来到贝尔编程")