save project

diy2.py

+username = "python"
+userpassword = "123456"
+while True:
+    name = input("输入用户名")
+    password = input("输入密码")
+    if name == username and password == userpassword:
+        print("登录成功!")
+        break
+    print("用户名和密码错误!请重新输入")
+while True():
+    if name!=username:
+        break
+    print("用户名错误!请重新输入")
+while True():
+    if password != userpassword:
+        break
+    print("密码错误!请重新输入")
+print("欢迎来到贝尔编程!")
\ No newline at end of file