C++ help

I have to write a c++ programe that calculate how much paint cans you need to paint a rooms. each rooms have about 12 feet x 10 feet with 8 foot ceilings. each room contains 4foot x 5 foot window and a 3 foot x 7 door. in programe i have to ask the user how much door and windows in room. Can anyone help me

How big an area can each paint can paint? And is it just the walls you paint?

Seems rather straightforward. What exactly do you seem to be having problems with? And like Lenny said, how much area can the cans paint?

here lab teacher gave us i don't know how to start it up.

Sure he didn't tell you how big an area each can paints?

It could be that a can paints 175 square feet, or it could be that the second wasn't fully used as both paint 200 square feet.

I don't know C++, but if it was done in VB you'd declare your variables, right? I guess that there is a similar thing done in C++?

Ya your teacher needs to tell you the coverage of a paint can. By that information, a can of paint could cover 349 square feet of room.

Damn I wish I was back at this level... *sigh*

Anyhow, for your program, you'll have something like this. (This is just pseudocode; don't copy it straight, because it won't work)

int totalarea
int doorarea
int windowarea
int paintablearea
int numdoors
int numwindows
int numcans

totalarea = 8 * 10 * 12

cout << how many doors?
cin >> numdoors
doorarea = numdoors * 3 * 7

cout << how many windows?
cin >> numwindows
windowarea = numwindows * 4 * 5

paintablearea = totalarea - (doorarea + windowarea)

numcans = ceil(paintablearea / WHATEVER A CAN PAINTS)
cout << The number of cans you'll need is << numcans