#include <iostream>
#include <unistd.h>
#include <signal.h>

using namespace std;

int count = 0;

void catchSig(int signum)
{
    //cout<< "进程捕捉到了一个信号，正在处理中： "<< signum << " pid: " << getpid() <<endl;
    cout << "final cout :" << count << endl;
}

//typedef void (*catchSig) (int);

int main(int argc,char* argv[])
{
    alarm(1);

    signal(SIGALRM,catchSig);

    while(true) count++;
}

运行结果：