save project

diy2.py

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