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

using namespace std;

void DoKill(int pid, int signal) {
   cout << "Sending a " << signal << " to " << pid << endl;

   if(-1 == kill(pid, signal)) {
      perror("kill");
   }

   cout << endl;
   usleep(1000);
}

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

     int pid{0};

     if (argc > 1) {
        pid = atoi(argv[1]);
     } else {
        cout << argv[0] << " pid" << endl;
        return 0;
     }

     cout << "mypid = " << getpid();

     cout << endl;
     DoKill(pid, 1);
     DoKill(pid, 2);
     DoKill(pid, 10);
     DoKill(pid, 9);
     
     return 0;
}