save project

.py

-i=4
-if i>0:
-    i=i-1breakbreakbreaki=4
-if i>0:
+i=5
+username = "python"
+useroassword = "123456"
+while True:
+    if i>0:
+        name = input("请输入一个用户名")
+        password = input("请输入密码")
         i=i-1
+        if name == username and password == useroassword:
+            print("登录成功")
+            break
+        elif name != username:
+            print("用户名错误,请重新输入")
+        else:
+            print("密码输入错误,请重新输入")
+print("欢迎来到贝尔编程")
\ No newline at end of file