OSA B1

 B1: Write a C/C++ script to display all logged in users.  

Program:

#include<stdio.h>

#include<unistd.h>

#include<stdlib.h>

#include<iostream>

using namespace std;

main()

{

cout<<"*****PROGRAM TO SHOW LOGGED IN USER AND NUMBER OF LOGGED IN USER****\n";

cout<<"LOGGED IN USERS ARE:-\n";

cout<<system("who -u");

cout<<"NUMBER OF LOGGED IN USERS ARE :-\n";

cout<<system(" who -u| wc -l");

}

Output:

shubham@Inspiron-1545:~$ g++ assign1.cpp

shubham@Inspiron-1545:~$ ./a.out

 The Real User Name is cl2