save project

2-4-diy4-2.py

+i=3
 username = "luo"
 userpassword = "123456"
 while True:
-    name = input("请输入用户名:")
-    password = input("请输入密码:")
-    if name == username and password == userpassword:
-        print("登录成功!")
-        break
-    elif name != username:
-        print("用户名不存在,请重新输入!")
+    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
+        elif name != username:
+            print("用户名不存在,请重新输入!")
+            print("您还有"+str(i)+"次机会。")
+            continue
+        else:
+            print("密码输入有误,请重新输入!")
     else:
-        print("密码输入有误,请重新输入!")
-print("欢迎来到贝尔编程!")
\ No newline at end of file
+        print("账户已锁定。")
+        exit()
+print("欢迎来到这里！")
\ No newline at end of file