As far as I know, they're basically the same thing.
PPC = Pay Per Click
CPC = Cost Per Click
When you run an overall PPC campaign, CPC is one of the metrics you use to measure the profitability and effectiveness of the campaign.
You can make money with PPC if you have a good product, you write effective ads and you have a high-converting landing page. In that case, the cost of the clicks on your ads will be more than offset by the revenue you get from sales, so you'll make a profit.
Conversely, if you don't have these things in place, you can also lose
a lot of money with PPC.