save project

diy1.py

 username="python"
 username="python"
 userpassword=123456
 userpassword=123456
-name=input("请输出你的账号")
-password=input("请输出你的密码")
-if username==name and userpassword==password:
+while True:
+    name=input("请输出你的账号")
+    password=input("请输出你的密码")
+    if username==name and userpassword==password:
         print("登录成功")
         print("登录成功")
-
+        break
+    print("账号和密码错误。")    
+print("欢迎来到贝尔编程")
\ No newline at end of file