Decimal ceil()

**peckitt99** · 04-03-2006

i have a problem with rounding off or even getting a decimal plce.

i am trying to work out the vat on 15 which would be 2.625. not only does the program not out put 2.625 just 2 it wont round off to just 2.63.

Here is the coding that i am using

Code:

                cout << endl;
                cout<<ceil(17.50/100);
                cout << endl;

can anyone help with my problem?

anything will be a great help thanks

**7stud** · 04-03-2006

1)

i am trying to work out the vat on 15 which would be 2.625. Here is the coding that i am using

Code:

                cout << endl;
                cout<<ceil(17.50/100);
                cout << endl;

Do you expect this:

Code:

cout<<ceil(17.50/100);

to display 2.65? In what number system will you get that result?

2)Take a look at this:

Code:

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


int main() 
{
	double vatPercent = 17.5;
	double vatDec = 17.5/100;
	
	double itemPrice = 15.0;
	double vat = itemPrice * vatDec;
	
	cout<<fixed<<setprecision(2)<<vat<<endl;


    return 0;
}

**peckitt99** · 04-03-2006

Yeah, thats a great help thanks, got that working,

just one more problem tho, where it has the "ItemPrice" and it is set at 15.0, how can i make it so it is a value that the user has inputed?

**hk_mp5kpdw** · 04-03-2006

Basic I/O... not that hard to do:

Code:

double itemPrice;

cout << "Enter the price: ";
cin >> itemPrice;

**peckitt99** · 04-03-2006

Cheers for that,

I have that working but i have now come (yet again) got another problem, n i have been trying to work it out, it is prob really simple but i now have it to output the sum with the vat added on. i now want to output the sum into a different function eg.

Code:

float calculateVAT(float cost)

        {

                 double vatDec = 17.5/100;

                 double itemPrice = cost;
	         double vat = itemPrice * vatDec + cost;

	        cout<<fixed<<setprecision(2)<<vat<<endl;
        }

void displayOrder(char initials[], char surname[], char address[],
                  char postcode[], int numberOfBottles, float cost,
                  float costPlusVAT, float deliveryCharge,float totalCost, int vat)

        {
                
                cout <<"Cost Including VAT:         " <<POUND<<vat <<endl;

}

anyone know what i can do to solve this new problem??

Thanks

**Ideswa** · 04-04-2006

Strange formatting.

Code:

float calculateVAT(float cost)

why return a float when you don't return a value?? Use Double for passing values.

The function "calculate" isn't called.

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