save project

sb.py/diy.py

 username="sb"
 username="sb"
-userpassword=
+userpassword="123456"
 while True:
 while True:
-    name=input("请输入账号")
-    password=input("请输入密码")
-    if name==username and userpassword ==password
-        print("登陆成功")
-        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")
-print("欢迎来到贝尔编程")
+    name=input("请输入用户名")
+    if name!=username:
+        password=input("请输入密码")
+        if  password==userpassword:
+            print("登陆成功")
+            break
+        else:
+            print("密码不存在,请重新输入") 
+    else:                                               
+        print("账号输入错误，请重新输入")
\ No newline at end of file
+print("欢迎来到贝尔编程")