save project

diy2.py

+i=0
 username = "1"
 userpassword = "1"
 while True:
+    if i<=3:
         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!")
             break
@@ -10,4 +13,7 @@ while True:
             print("用户名错误!请重新输入")
         else:
             print("密码错误!请重新输入")
+    else:
+        print("账号已被锁定")
+        exit()
 print("欢迎来到贝尔编程!")
\ No newline at end of file