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

void handle_sigint(int sig) {
    printf("Caught signal %d\n", sig);
}

int main() {
    signal(SIGINT, handle_sigint); // Register signal handler
    while (1) {
        sleep(1); // Sleep for 1 second
        printf("Process ID %d running...\n", getpid());
    }
    return 0;
}