#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>
#include <sys/types.h>
#include <err.h>



void clc(){


    //pipes
    int pipe1[2];// PIPE A
    int pipe2[2];// PIPE B
    if(pipe(pipe1) == -1) return;
    if(pipe(pipe2) == -1) return;


    char buffer[2048];
    char buffer2[2048];
    //fgets(buffer, 2047, stdin);


    pid_t pid = fork();

    if(pid < 0) return;
    if (pid == 0){

        while(read(pipe1[0],buffer ,2047 )){
            int n = atoi(buffer);
            
            if(n == -1) exit(0);
            char buf = n *n;

            write(pipe2[1], &buf , 1);
            

        }
    }

    else{
        
        read(pipe2[0], buffer2, 2048);
        if(strcmp(buffer2, "-1") == 0) {

            close(pipe1[0]);
            close(pipe1[1]);
            close(pipe1[0]);
            close(pipe1[1]);
            return;
        }
        printf("The Oracle says the square is: %s\n", buffer2);
    }
}

int main(){
    
    clc();


}