Having problems representing money

This is a discussion on Having problems representing money within the C++ Programming forums, part of the General Programming Boards category; This is a very amatuerish question, but no matter what I try, there is no flexibility with setprecision when it ...

  1. #1
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    Having problems representing money

    This is a very amatuerish question, but no matter what I try, there is no flexibility with setprecision when it comes to me wanting just two places beyond the decimal. When I use setprecision(2) and enter a value as 3.75, for instance, I get 3.8. So setprecision goes by the entire numbers' digits, right? And I also have to represent another float, starting at 1000.00, as ongoing funds. If I set the precision at 6, and the funds are less than 1000, it rounds to three digits behind the decimal and I get the same problem I had with the smaller number when the funds are greater than 9999.99. Is there a more flexible standard way to represent money, or will I have to write a rounding script? And if so, I'm new to programming, and am a little lost on how to go about writing one. I'd like to know if there's a standard way to solve this problem, though.

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    Use fixed before setprecision.

    cout <<fixed<<setprecision(2) << 1234.56789<<endl

    This will print 1234.56

  3. #3
    S Sang-drax's Avatar
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    Code:
    #include <iomanip>
    #include <iostream>
    using namespace std;
     
    cout << fixed << setprecision(2) << myMoney;
    Hope that helps!
    Last edited by Sang-drax : Tomorrow at 02:21 AM. Reason: Time travelling

  4. #4
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    Oh wow. Thank you very much. I was putting fixed AFTER setprecision. I guess my book is a little out of date.

    Actually it didn't work. I get an error that says fixed is undeclared and it says to "first use this function."
    Last edited by madgolfertom; 07-23-2004 at 08:45 AM. Reason: More to say

  5. #5
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    Strange, does this work?


    Code:
    #include <iostream>
    #include <iomanip>
    using namespace std;
    
    int main(int argc, char* argv[])
    {
    	cout << fixed << setprecision(2) << 1234.5678;
    
    	return 0;
    }

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    Still doesn't work. Does fixed have to be the first thing right after cout? I'll try tinkering around a bit.

  7. #7
    Sweet
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    what compiler do you have?
    Woop?

  8. #8
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    I thought that might be the problem. I have Bloodshed Dev-C++ Version 4.

  9. #9
    Sweet
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    Try this instead
    Code:
    cout.setf(ios::fixed);
    [edit]
    oh and if you want to get rid of that setting just do this
    Code:
    cout.unsetf(ios::fixed);
    [/edit]
    Last edited by prog-bman; 07-24-2004 at 01:09 AM.
    Woop?

  10. #10
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    That worked great. Thank you very much, and sorry for blowing a simple question out of proportion.

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