1.any communication that encodes a message;
signals from the boat suddenly stopped
2.any incitement to action;
he awaited the signal to start
3.an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes
4.notably out of the ordinary;
the year saw one signal triumph for the Labour party
1.communicate silently and non-verbally by signals or signs;
He signed his disapproval with a dismissive hand gesture
2.be a signal for or a symptom of;
These symptoms indicate a serious illness
函數(shù)名: signal 表頭文件 #include<signal.h> 功 能: 設(shè)置某一信號的對應(yīng)動作 函數(shù)原型 :void (*signal(int signum,void(* handler)(int)))(int); 或者:typedef void(*sig_t) ( int ); sig_t signal(int signum,sig_t handler); 參數(shù)說明: 第一個參數(shù)signum指明了所要處理的信號類型,它可以取除了SIGKILL和SIGSTOP外的任何一種信號。 第二個參數(shù)handler描述了與信號關(guān)聯(lián)的動作,它可以取以下三種值: (1)一個無返回