save project

diy2.py

+i = 3
 username = "python"
 userpassword = "123456"
 while True:
+    if i>0:
         name = input("请输入用户名:")
         password = input("请输入密码:")
-    if name == username and password == userpassword: 
+        if name == username and passwoserpassword: 
             print("登录成功!")
             break
-    if name != username
+        elif name != username
             print("用户名不存在,请重新输入用户名")
-        continue
-    if password != userpassword
+            i-=1
+        else:
             print("用户密码错误,请重新输入密码")         
-print("欢迎来到贝尔编程!")
\ No newline at end of file
+            exit()
\ No newline at end of file