Programming

     ...
        else
          {
             printf("I am a child process and my pid is %d\n", getpid());
             cout<<"Parameters are: "<<endl;
              for (int j=0; j<i; j++)
                  cout<<doit[j]<<endl;
             cout<<"       EXECUTE CHILD"<<endl;
             initial=time(&initial);
             execve(doit[0], doit, NULL);
             final=time(&final);
             exit(0);
          }
       cout<<"     KILL CHILD AND RETURN TO PARENT"<<endl;
       printf("I am still the parent process and my pid is %d\n",
         getpid());
       //float elapsed=final-initial;
       printf("It took %u seconds to execute that command.\n",
          (final-initial));
...

main()
{
      int one, two;
      one=time();
      sleep(3);
      two=time();
      printf("time = %d \n", (two-one));
      exit(0);
}