#include <sys/types.h> 	//pid_t
#include <unistd.h> 	//fork()
#include <sys/wait.h> 	//waitpid
#include <stdio.h> 		//printf...
#include <stdlib.h> 	//exit()
//gp-3.c	
void main(){
	int pid1,pid2,pid3;
	
	if (pid3=fork() == 0) 
		execlp("/home/mumolo/proc","proc","T3",NULL);
	
	if (pid1=fork() == 0) 
		execlp("/home/mumolo/proc","proc","T1",NULL);

	waitpid(pid1, NULL, 0);
	
	if( pid2=fork() == 0) 
		execlp("/home/mumolo/proc","proc","T2",NULL);

	waitpid(pid2, NULL, 0);

	waitpid(pid3, NULL, 0);
}