Need somebody who understand Language C

Hi there guyz, iam studing now an program language c on a discipline who call sdac (in english is) systems of architecture computing. So iam doing a final project, that is a little program called "Mini-market of DiogoCosta" i just need 2 things, 1 its the discount, if the client is regular i press the r and then the printf says 50% discount but if its new client i press n and then the printf says 20% discount. then the total ammout to play wish is the value received by the products wish i already got less the discount. I need the code until monday, and iam rrlly thankfull if somebody could send the code {{sticker:slayer-jinx-wink}}
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