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

//This is not a good idea
//Should create 2 pipes rather than use 1 bidirectional pipe
int main(void){
    int pipefds[2];
    
    pipe(pipefds);
    pid_t id = fork();
    if( id == 0){
        //I am the child
        char message[] = "Hi mum!\n";
        char buf[100] = {};
        read(pipefds[0],buf,100);
        write(pipefds[1],message,strlen(message));
        printf("I am the child and I got the message %s\n",buf);
        close(pipefds[0]);
    } else {
         
        //I am the parent
        char message[] = "Hello my child\n";        
        write(pipefds[1],message,strlen(message));
        char buf[100];
        read(pipefds[0],buf,100);       
        printf("I am the parent and I got the message %s\n",buf);
        close(pipefds[1]);
    }
    return 0;
}