save project

diy2.py

+
+i=3
+username="python"
+userpassword = "123456"
+while True:
+    if i<=3
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i=-1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            str
+
+            break
+        if !=username
+            print("用户名错误")
+            continue
+        if !=usepassword
+            print("密码错误")
+            print("给我死过来!!!")
+else:
+             exit()
+print("欢迎来到贝尔编程!")
\ No newline at end of file