Question

how does one use 5 function headers in a progrm that calculates a customer recipt slip. functions such as calculateCarpetSize, calculateCarpetcost, calculateLabourcost,QualifyforDiscount, ComputeDiscount, PRINTcustomerStatement. PLEASE HELP ME OUT

Answer 1

Here is a definition of a Function Header in C++. Not sure if you are using a different language, but it covers what the topic means there:
http://www.uwplatt.edu/~hasker/cs143/annotated/def-header.html

As you can see, the header just defines what is put in.

Answer 2

Each function must do its own work (calculation) but make sure main() is your core function focuses on necessary things enter ring the prices and sizes of the carpet etc .the Function QualifyDiscount should be boolen .In c++ :D