A Simple Problem

[OleFowdie]

I am extremely new to programming... like working on my first program.
I cannot seem to get this right:

#include <iostream>
#include <iomanip>
#include <cmath>
	using namespace std;

int main()
{
	float fHeight, fWidth, fLength, fPaintSpace, fGallonCost, fArea, fArea2, fCost;

	cout << "Welcome to the Paint Calculator (version 1.0.0)!\n\n";
	cout << "What is the height of the room to be painted?\n";
	cin >> fHeight;
	cout << "What is the width of the room to be painted?\n";
	cin >> fWidth;
	cout << "What is the length of the room to be painted?\n";
	cin >> fLength;
	cout << "How much space can one gallon of the desired paint cover?\n";
	cin >> fPaintSpace;
	cout << "How much does one gallon of the desired paint cost?\n";
	cin >> fGallonCost;

	fArea = fHeight * fWidth;
	fArea2 = fHeight * fLength;
	fArea *= 2;
	fArea2 *= 2;
	fArea += fArea2;
	fArea = fArea / fPaintSpace;
	fCost = (ceil (fArea)) * fGallonCost;

	cout << "\nYou will need " << ceil (fArea) << " gallons of paint.\n";
	cout << "Which will cost $" << setprecision(2) << fixed << fCost << endl;

	return 0;
} // end main 

I ran it with a test value of fGallonCost 10, the program then proceeded to tell me that I needed one gallon with a cost of 20. I know that this must be a logic error... come one though, I am a new programmer and I'm only in my early 20's. That's to be expected right?

[Zaita]

You should provide us with the input numbers you used for each variable. Just makes it easier for us to duplicate your problem.

Edit: Basic check shows it works correctly to me.

[OleFowdie]

8.8 - height
8.8 - width
8.8 - length
300 - paint space
10.00 - gallon cost

[LacViet]

I tried it with a Heigth of 1, Width 1, Length 1, Paint space 1, and cost 1. And I get only $4. So excluding the floor, I think you're missing a another side somewhere, maybe ceiling? O.o

Maybe changing fArea2 *= 2; to fArea2 *= 3; To include the ceiling.

[Faldrax]

Tried your numbers and got 2 gallons and $20, which looks OK.

[OleFowdie]

Wow. I am sorry everyone. Like I said this is my first program ever. My error was in my syntax... sorry everyone.