#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string>
#include <sys/wait.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>

#define ODCZYT 0
#define ZAPIS 1
#define SPIJ 3
#define LEN 10
#define nmbProcess 3

using namespace std;

int main()
{
	mkfifo("pipeFile", 0666);

	while (true)
	{
		char* text = new char[LEN];
		cout<<"enter "<<endl;
		cin>>text;

		int process_1 = fork();
		int end1 = 1;
		int k = nmbProcess;

		if(process_1 == -1)
			return 1;
		else if (process_1 != 0)
		{
			cout<<"Process A"<<endl;
			int file = open("pipeFile", 0666);
			sleep(SPIJ);
			write(file, text, sizeof(text));
			sleep(SPIJ-2);
			close(file);


			delete []text;
		}
		else
		{
			cout<<"Process B"<<endl;
			int file = open("pipeFile", O_RDONLY);
			read(file, text, sizeof(text));
			close(file);
			char *change = new char [LEN];
			int end2 = 1;

			int process_2 = fork();

			if (process_2 == -1)
				return 1;
			else if (process_2 != 0)
			{
				for (int i=0; text[i]!= 0; i++)
				{
					change[i] = text[i];
					if(text[i]<= 'z' && text[i]>='a')
					{
						change[i]= text[i] - 32;
					}
				}
				sleep(SPIJ);
				file = open("pipeFile", O_WRONLY);
				write(file, change, sizeof(change));
				close(file);
				sleep(SPIJ-2);
				delete []change;

			}
			else
			{
				cout<<"Process C"<<endl;
				char* text2 = new char[LEN];
				sleep(SPIJ);
				int file = open("pipeFile", O_RDONLY);
				read(file, text2, sizeof(text));
				close(file);
				sleep(SPIJ-2);
				cout<<"ODP:	"<<text2<<endl;
				sleep(SPIJ-2);

				delete []text2;
			}

		}
		while(k-->0)
			int d = waitpid(-1,NULL,0);
	}


	return 0;
}