need help in C language programming

Hi i have an assignment in c language, could someone help me or provide me any sample code, here is the discription, i will be greatly thankful to u…

1.Product file with price and discount information. It should be possible to do some basic maintenance of the file.

2.Customer file with customer information like customer number, name, adress etc.It should be possible to do some basic maintenance of the file.

3.You should be able to enter customer orders and save them to a file, using the stored product and customer information.