save project

编程.py

+username="python"
+username="python"
+userpassword="123456"
+i=3
+while True:
+    if i>0:
+        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!")
+            break
+        if name!=username:
+            print("用户名错误，请重新输入！")
+            continue
+        if password != userpassword:
+            print("密码输入有误，请重新输入！")
+    else:
+        print("锁定")
+        exit()
+print("欢迎来到贝尔编程！")