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#include<unistd.h>

#include<fcntl.h>

#include<sys/types.h>

#include<sys/stat.h>

#include<sys/wait.h>

#include<iostream>

using namespace std;

int main(){

pid_t q;

cout << "before fork" << endl;

q = fork();

if(q<0){

cout << "error" << endl;

}

else if(q == 0){

cout << "I am child having pid " << getpid() << endl;

cout << "My parent's pid is " << getppid() << endl;

}

else{

wait(NULL);

// sleep(1);

cout << "I am parent having pid " << getpid() << endl;

cout << "My Child's pid is " << q << endl;

}

cout << "common" << endl;

}