save project

diy1.py

+i=3
 username = "python"
 userpassword = "123456"
 while True:
+    if i>0:
         a=input("用户账号:")
         b=input("账号密码:")
+        i-=1
         if a==username and b==userpassword:
             print("登陆成功！")
             break
@@ -12,4 +15,5 @@ while True:
                 continue
             else:
                 print("密码错误，请重新输入！")
+                exit()
 print("欢迎来到贝尔编程！")
\ No newline at end of file