save project

345.py

-if player==computer:
-    print("平局")
-elif player=="石头"and computer=="剪刀"
-    print("恭喜，你赢了")
-elif player=="剪刀"and computer=="布"
-    print("恭喜，你赢了")
-elif player=="布"and computer=="石头"
-    print("恭喜，你赢了")
-else:
-    print("很遗憾，你输了")    
\ No newline at end of file
+username = "python"
+userpassword = "123456"
+while True:
+    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!")
+        break
+    elif name !=username:
+        print("用户名不存在,请重新输入!")
+    else:
+        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