#include <iostream>
#include <sys/types.h>
#include <unistd.h>
 
using std::cout;
using std::endl;
 
void function()
{                        
    pid_t pid1, pid2, pid3, pid4;
    pid1 = fork(); 
    if (pid1 == 0)
    {
        cout << "hi " << getpid() << " " << getppid()<< endl; /*first child process should print "hi"*/
    }
    pid2 = fork();
    cout << "hell " << getpid() <<" " << getppid() << endl;
    pid3 = fork();
    cout << "how "  << getpid() <<" "<<getppid() << endl;
    pid4 = fork();
 
    if (pid1 == 0 && pid2 == 0 && pid3 == 0 && pid4 == 0){
        return;/* final child process should exit from the system with out doing anything*/                                      
    } else if (pid1 > 0 && pid2 > 0 && pid3 > 0 && pid4 > 0){
        cout << "areyou "<< getpid() << "  "<< getppid() << endl;
    }
}
 
 int main() {
 /* and the root process should print  "are you"*/
    function();
    sleep(100);
}

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