#include <iostream>

#include <unistd.h>

#include <errno.h>
#include <string.h>

int main(int argc, char* argv[])
{
	std::cout << "PARENT64: My PID is " << getpid() << "; " << std::flush;

	switch (int pid = fork()) {
		case -1:			// error
			std::cout << "ERROR: " << strerror(errno) << std::endl;
			break;

		case 0: {			// child
			const char* cmd = 
					(argc > 1 && strcmp(argv[1], "64") == 0) ?
					"./child64" :
					"./child32";
			execl(cmd, cmd, 0);
			break;
		}

		default:			// parent
			std::cout << "created child PID " << pid << '.' << std::endl;
	}

	sleep(1);
}