* sigdemo3.c

代码说明：

* sigdemo3.c - shows how a signal handler works. * Input: - Interrupt (Ctrl + c) * Output: - Program may kill or not depends on the input (y/n) -* sigdemo3.c - shows how a signal handler works. * Input: - Interrupt (Ctrl+ c) * Output: - Program may kill or not depends on the input (y/n)