You need to understand how to do each line of the following. Start with the datasheets. If you are using a compiler read the manual that talks about the libraries you will be using.
Code:
start:
setup PIC IO ports
setup ADC
setup UART
etc...
loop:
read ADC
calculate temperature based on above reading
fomat string with temperature data
output string to UART
goto LOOP
It's presumably a school assignment, it looks like India (which I'm guessing is the area where he's from?) is trying to move a bit more modern, but have simply crossed out the antique processor in the old question, and replaced it with PIC.
I'm not trying to be funny - your assignment is such an absolutely crazy one, it's been set by someone who doesn't have the slightest clue what they are doing.