#include <iostream>#include <string>#include <sys/types.h>#include <unistd.h>using namespace std;int globalVariable = 2;main (){   string sIdentifier;   int iStackVariable = 20;		 //  struct task_struct task;   pid_t pID = fork();   if (pID == 0)                // child   {      // Code only executed by child process             sIdentifier = "Child Process: ";       globalVariable++;       iStackVariable++;    }    else if (pID < 0)            // failed to fork    {      cerr << "Failed to fork" << endl;      exit(1);      // Throw exception    }    else                        // parent    {      // Code only executed by parent process      sIdentifier = "Parent Process:";    }       // Code executed by both parent and child.    cout << sIdentifier;    cout << " Global variable: " << globalVariable;    cout << " Stack variable: "  << iStackVariable << endl;      int temp;    temp=getpid();	    cout<<"pid: "<<temp<<endl;	}