save project

diy2.py

+ybc=3
 username = "python"
 userpassword = "123456"
 while True:
+    if ybc>0:
         name = input("请输入用户名:")
         password = input("请输入密码:")
+        ybc-=1
         if name == username and password == userpassword:
             print("登录成功")
             break
@@ -12,4 +15,7 @@ while True:
         if password != userpassword:
             print("用户密码错误")
             continue
-print("欢迎来到贝尔编程!")
\ No newline at end of file
+    else:
+            print("次数已用完")
+            exit()
+    print("欢迎来到贝尔编程!")
\ No newline at end of file