Chosen Solution

Dropped my iphone 5c and it is cracked but works perfectly fine, can I just buy a screen?

You can. However, unless you have all the equipment and do the process all the time and are comfortable with the process, doing it will likely break more things than fix. I would just buy the whole assembly and save yourself some headache Here’s parts iPhone 5c Screen Here’s labor iPhone 5c LCD and Digitizer Replacement