save project

diy2.py

 username = "sb"
 userpassword = "123456"
+i=3
 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!")
-        break
-    if name!=username:
-        print('用户名错误')
-    if password!=userpassword:
-        print('密码错误')
-print('欢迎来到贝尔编程。')
\ No newline at end of file
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i=i-1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        if name!=username:
+            print('用户名错误')
+        if password!=userpassword:
+            print('密码错误')
+    else:
+        print("滚")
+print('欢迎来到贝尔编程。')