如何为 getline() 实现超时?
我想通过 C++ 中的 getline() 从命令行读取一个字符串.
I want to read a string from command line through getline() in c++.
为此，我想添加一个 5 秒的计时器.如果没有读取字符串，则程序将终止.
For that I want to add a timer of 5 sec. If no string read, then the program will terminate.
我该怎么做?
推荐答案
怎么样:
/* Wait 5 seconds. */
alarm(5);
/* getline */
/* Cancel alarm. */
alarm(0);
您也可以使用 setitimer.
作为R.Martinho Fernandes 要求:
alarm 函数安排当前进程在其调用后 5 秒内接收 SIGALRM.SIGALRM si 异常终止进程的默认操作.调用 alarm(0) 会禁用计时器.
The function alarm arranges for the current process to receive a SIGALRM in 5 seconds from its call. The default action for a SIGALRM si to terminate the process abnormally. Calling alarm(0) disables the timer.
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