save project

diy2.py

 username = "python"
 userpassword = "123456"
-a=0
+a=5
 while True:
-    if a<5:
+    if a>0:
         name = input("请输入用户名:")
         password = input("请输入密码:")
-        a+=1
+        a-=1
         if name == username and password == userpassword:
            print("登录成功!")
            break
         #print("用户名和密码错误!请重新输入")
         if name != username:
-                print("用户名错误")
+                print("用户名错误还剩"+str(a)+"次机会")
                 continue
         if password != userpassword:
-            print("密码错误")
+            print("密码错误还剩"+str(a)+"次机会")
     else:
         exit()
 print("欢迎来到贝尔编程!")
\ No newline at end of file