save project

24diy1.py

+i=3
 usename = "python"
 userpassword = "123456"
 while True:
+    if i>0:
         a=input("请输入用户名")
         b=input("请输入密码")
+        i-=1
         if a == usename and b == userpassword:
             print("登录成功!")
             break
@@ -11,4 +14,6 @@ while True:
             continue
         if b != userpassword:
             print("密码错误")
+    else:
+        exit()
 print("欢迎来到贝尔编程")
\ No newline at end of file