save project

diy2.py

+username = "z"
+userpassword = "123456"
+num=3
+while True:
+    if num>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        num-=1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        if name!= username:
+            print("请重新输入账户名")
+            continue
+        if password!=userpassword:
+            print("请重新输入密码")
+    else:
+        print("账号已锁定")
+        exit()
+print("欢迎来到贝尔编程")
\ No newline at end of file