save project

diy2.py

+i=3
+username="12"
+userpassword="1"
+while True:
+    if i>0:
+        name=input("输入用户名")
+        password=input("输入密码")
+        i-=1
+        if username==name and userpassword==password:
+            print("登录成功")
+            break
+        if username!=name:
+            print("用户错误")
+            continue
+        if userpassword!=password:
+            print("密码错误")
+    else:
+        print("账号锁定")
+        exit()
+print("欢迎来到贝尔")
\ No newline at end of file