save project

diy2.py

-username = "python"
-userpassword = "123456"
+a = "ba ba"
+b = "1234"
 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:
+    A = input("请输入用户名:")
+    B = input("请输入密码:")
+    if A == a and B == b:
         print("登录成功!")
         print("登录成功!")
+        break
+    if a!=A:
+        print("用户名错误!")
+    if b!=B:
+        print("密码错误!")
     print("用户名和密码错误!请重新输入")
     print("用户名和密码错误!请重新输入")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file