信号

//信号#include <stdio.h>#include <errno.h>#include <string.h>#include <stdlib.h>#include <signal.h>void handler(int signal_num){        switch(signal_num)        {                case SIGINT:                {                        printf("Ctrl +C\n");                }        }}int main(int argc,char *argv[]){        signal(SIGINT,handler);        while(1)        {                printf("hello world\n");                sleep(1);        }        /*pid_t child;        child = fork();        if(child == 0)        {                printf("Parrent [%d] create child [%d] \n",getppid(),getpid());                exit(0);        }        else if(child > 0)        {                printf("Parrent [%d] create success!\n",getpid());        }        printf("Parrent [%d] quit!\n",getpid());*/        return 0;}