how to add the calculation of temperature in my source code

[skimask]

i using the 16F877A PIC, and the temperature sensor i using LM35DZ and i only want clesius and count form 0-100oC because i want to measuring the boiler and i using the cable around 4meter only and using power supply +5V so all thing i let u all knw very clearly ad and i knw my english no good no lought ppl....and that is my assignment...i know u all no help ppl to do assignment so i jst want to ask how to adding the math formula in my program and where can get it the formula becasue i no stronge in math so want to ask u all to help me....!!!

How many times do you have to be reminded that there is a SEARCH function here (not to mention GOOGLE returns a couple dozen decent hits...).
The SEARCH here, gives me 19 hits (including one practically pre-made example, linked on a different site, but nonetheless, practically complete), and of those 19 hits, 12 of them have working code in them.