save project

diy2.py

 username = "sb"
 username = "sb"
 userpassword = "123456"
 userpassword = "123456"
+i=3
 while True:
 while True:
+    if i>0:
         name = input("请输入用户名:")
         name = input("请输入用户名:")
         password = input("请输入密码:")
         password = input("请输入密码:")
+        i=i-1
         if name == username and password == userpassword:
         if name == username and password == userpassword:
             print("登录成功!")
             print("登录成功!")
             break
             break
@@ -10,4 +13,6 @@ while True:
             print('用户名错误')
             print('用户名错误')
         if password!=userpassword:
         if password!=userpassword:
             print('密码错误')
             print('密码错误')
+    else:
+        print("滚")
 print('欢迎来到贝尔编程。')
 print('欢迎来到贝尔编程。')