int kill=0;
int proces1;
int proces2;
 
	void child2()
	{
		for(int b=0; b<100; b++)
		{
			sleep(2);
			cout << "2" << endl;
			if(kill==1)
			{
				cout << "killing child 1..." << endl;
				proces2=0;
				return;
			}
		}
	}
	void child1()
	{
		for(int a=0; a<100; a++)
		{
			sleep(3);
			cout << "1" << endl;
			if(kill==1)
			{
				cout << "killing child 2..." << endl;
				proces1=0;
				return;
			}
		}
	}
 
 
int main(int argc, char *argv[])
{
 
 
	int pid1, pid2;
	proces1 = 1;
	proces2 = 1;
 
	pid1 = fork();
	if(pid1 == 0)
	{
		child1();
	}
	else
	{
		cout << "forked 1" << endl;
	}
 
 
	pid2 = fork();
	if(pid2==0)
	{
		child2();
	}
	else
	{
		cout << "forked 2" << endl;
	}
 
	cout << "main runing" << endl;
 
 
	for(int clock=0; clock<100;clock++)
	{
		if(kill==0)
		{
			sleep(5);
			cout << "more processes needed, program runinig..." << endl;
			cin >> kill;
		}
		else
		{
			clock=200;
		}
	}
 
	cout << "killing signal received" << endl;
 
	sleep(10);		// just for sure 10 secs
 
	for(int ok=0; ok<1000; ok++)
	{
	if(proces1==0)
	{
		cout << "process 1 killed..." << endl;
		if(proces2==0)
		{
			cout << "process 2 killed..." << endl;
			ok = 1001;
		}
		else
		{
			cout << "zombie processes stil alive..." << endl; 
		}
	}
	}
 
  return EXIT_SUCCESS;
}

int kill;
int processStatus1;
 
int main()
 
 int child1, child2, child3 ...
 
 child1 = fork();... calls the refresh function for example...
 child2 = fork();... calls the virtualSpace function ...
 and so on...
 
 kill =1;