save project

zhangh.py

+name="python"
+word="123456"
+while True:
+    N=input("请输入用户名:")
+    W=input("请输入密码:")
+    if N==name and W==word:
+        print("登录成功")
+        break
+    elif N!=name:
+        print("账号错误，请重新输入")
+    else:
+        print("密码错误，请重新输入")
+print("欢迎来到贝尔编程！")