save project

diy2.py

-username = "python"
-userpassword = "123456"
+username = "     "
+userpassword = "     "
+i=3
 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")
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i- 1
+        if name == username and password == userpassword:
+            print("登录成功!")
+        if name != uesrname :
+            print("用户名不存在，再来一次")
+            continue
+        if password != uesrpassword :
+            print("密码错误，再来一次")
+    else :
+        print("您的帐户别想要了")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file