booking.sol

pragma solidity ^0.4.0;

contract hotel {
    
    string public hotelName;
    string public location;
    uint public numRooms;
    
    constructor(string name, string loc, uint r) public    {
        hotelName = name;
        location = loc;
        numRooms = r;
        }
    }
    
    struct room {
        uint capacity;
        uint numOccupants;
        occupied occStatus;
        address occupier;
    }
    
    room [ ] public rooms;  
    //set as public so that we can check the capacity, 
    //number of occupants and occupancy status of any room
    
    enum occupied {
        available, occupied, cleaned
    }
    
    function addRoom (uint num) public {
        for (uint x = 0; x < num; x++)  {
            rooms.push;
            numRooms++;
        }
        
    }
    
    function changeRoomOccupancyStatus (occupied o, uint roomNo) public  {
        if (o == occupied.available) {
            rooms[roomNo].occupier = msg.sender;
            rooms[roomNo].occStatus = occupied.occupied;
            rooms[roomNo].numOccupants = rooms[roomNo].capacity;
        }
        else if (o == occupied.occupied)    {
            require (rooms[roomNo].occStatus != occupied.occupied);
        }
        else if (o == occupied.cleaned)    {
            rooms[roomNo].occStatus = occupied.available;
            rooms[roomNo].occupier = 0;
            rooms[roomNo].numOccupants = 0;
        }
    }
    
}