#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <signal.h>

int *a = NULL;

void orice(int sig) {

    printf("Received signal %d\n", sig);

    if(NULL != a) {

        free(a);

        a = NULL;

    }

    exit(0);

}



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

    printf("PID %d\n", getpid());

    signal(SIGINT, orice);

    a = malloc(sizeof(int));

    while(1) {

        printf("Working...\n");

        sleep(1);

    }

    return 0;

}