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decimal display problem

 
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decimal display problem, display 2 decimal places to the right
Renzokusen
10 May, 2008 - 09:56 AM
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Joined: 11 Mar, 2008
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I'm currently have problems displaying ONLY 2 decimal places to the right of a decimal in either a float or a double variable. My teacher hasn't come to me with a decent response other than << fixed; which display to many places.

I'm working with currency which is only 2 decimal places. My float will display 23.23 perfectly, but when the amount ends in a 0 it will display 23.2 instead of displaying the correct 23.20.

If you need some code to understand this better just say so. I don't think I need to post any since it's kinda not a code problem an more of a .... not sure how to discribe it. biggrin.gif

Thank you
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Martyr2
RE: Decimal Display Problem
10 May, 2008 - 10:12 AM
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Best way to show you is with a simple example...

cpp

#include <iostream>
// Needed to manipulate the output of cout
#include <iomanip>

using namespace std;

int main( )
{
	// Our float
	float PI = 3.1415;

	// Set precision to 2 places, fixed decimal point, show PI
	cout << setprecision(2) << fixed << PI << endl;
	return 0;
}


We use setprecision(2) to say 2 decimal points and fixed for a fixed decimal place. This will give you the two decimal points with rounding.

Enjoy!

"At DIC we be fixed point code ninjas, mess with us and we will 'fix' you to the 'point' where you will be unrecognizable!" decap.gif
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Renzokusen
RE: Decimal Display Problem
10 May, 2008 - 10:27 AM
Post #3

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Ah I see what the problem was. My teacher gave me that code, but never told me about #include <iomanip> . No wonder it wouldn't work.

Thanks for the help it works fine now
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