Divide the output of the ADC into bytes, grab those bytes, and store them in variables. The way you display it is entirely dependent upon what it represents. If a value of 50 represents 2 degrees centigrade, then you have to convert or scale that. If it represents twice the number of items that passed a photocell, then you have to convert or scale that.
You need to forget about the code for a few hours and get your thinking cap on. Only YOU know what the hell your system is and what it represents (unless you deign to tell us).