having trouble understanding functions and assignment on box dimensions

[chrissyln13]

I am totally and utterly stuck. This is a distance ed course that I'm taking in school so when im stuck there is no one to go to...can anyone help? I need to get this done tomorrow.
The program is supposed to ask the user for any 3 of 4 deimensions of a box (length, width, height, or volume). For the fourth value, intruct the user to enter 0.
Base on the user responce, given any 3 measurements, you should calculate the fourth and display a summary of the information to the user. In other words, for whichever value the user entered 0, your program should calculate the appropriate value.

I need to use four functions.
Main()
BoxDimensions (...)
DisplayData(...)
and ProcessAnother()

I have no idea how to use multiple functions and have been reading so much and can't figure it out and now it's down to crunch time...can anyone point me in the right direction????
Thanks

[Zaita]

Ok. This is a very simple example.

#include <iostream>

using namespace std;

void printSomethingFunction() {
 cout << "Something" << endl;
}

int main() {
 // Call printSomethingFunction
 printSomethingFunction();

 return 0;
}

[chrissyln13]

thanks...I think im starting to figure it out....slowly.