#include <sys/types.h> 	//pid_t
#include <unistd.h> 	//fork()
#include <sys/wait.h> 	//waitpid
#include <stdio.h> 	//printf...
#include <stdlib.h> 	//exit()
//gp-1.c	
void main(){
	int pid1,pid2,pid3;
	
	pid1=fork(); 
	if(pid1==0) execlp("/home/mumolo/proc","proc","T1",NULL);
	
	pid3=fork();
	if(pid3==0) execlp("/home/mumolo/proc","proc","T3",NULL);

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

	waitpid(pid3, NULL, 0);

	waitpid(pid2, NULL, 0);
}