Thank you for pointing that out.
Project code that I'm trying to run has the line in the begining to include dht library
#include<dht.h>
When I tried to compile that code it gave me following error
error: 'dht' does not name a type
dht DHT;
The project code owner reply was "Download DHT library from Arduino Playground - DHTLib and install it"
When I open this page I found the code for dht.h and dht.cpp at the end of the page.
How can I install it into my arduino library without having packed .zip file?
Hope this time my explanation was better, I am an beginner, please bare with me 