while循环中scanf不阻塞
时间: 2023-08-16 22:16:09 浏览: 271
回答: 在while循环中,scanf函数默认是阻塞的,即会等待用户输入数据。当用户输入数据后,scanf函数才会返回并将数据赋值给指定的变量。所以在while循环中,如果没有用户输入数据,scanf函数会一直阻塞,导致循环无法继续执行。为了避免这种情况,可以在scanf函数后面添加判断条件,比如使用scanf的返回值来判断是否成功读取到数据,或者使用scanf(……) != EOF来判断是否到达文件末尾。这样可以确保在没有输入数据时,循环能够正常结束。\[1\]\[2\]\[3\]
#### 引用[.reference_title]
- *1* [【C语言】EOF搭配while循环来控制scanf输入的次数](https://blog.csdn.net/weixin_59511824/article/details/131178927)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control_2,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* [EOF的意义及用法(while(scanf("%d",&n) != EOF))](https://blog.csdn.net/henu1710252658/article/details/83040281)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control_2,239^v3^insert_chatgpt"}} ] [.reference_item]
- *3* [关于while(cin>>x)和while(scanf(“%d,&x))的区别](https://blog.csdn.net/weixin_62636014/article/details/123075808)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control_2,239^v3^insert_chatgpt"}} ] [.reference_item]
[ .reference_list ]
阅读全文