Alignment of Output

This is a discussion on Alignment of Output within the C++ Programming forums, part of the General Programming Boards category; Im outputting text to a file, using setw and setfill. Im trying to create this in a text file: Code: ...

  1. #1
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    Alignment of Output

    Im outputting text to a file, using setw and setfill.

    Im trying to create this in a text file:
    Code:
    Gross Amount............. $1000.00
    Federal Tax.............. $ 150.00
    However, I cannot get it to align correctly, and often the hundreds place lines up with the thousands place in the money column. Here's the code I'm using:
    Code:
    outFile << "Gross Amount" << setfill('.') << right << setw(15) << right << " $" << grossAmount << right << endl;
    outFile << "Federal Tax" <<  setfill('.')  << right << setw(15) << right << " $" << federalTax << right << endl;
    You probably noticed theres like 4 different 'right' in each line - basically because im tossing them everywhere to try and get it to align the money to the right. Any ideas? Im new at this.

  2. #2
    Registered User major_small's Avatar
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    you need to put a little math in your setw's

    Code:
    #include <iostream>
    #include <iomanip>
    #include <string>
    
    int main()
    {
    	float grossAmount=1000.00f;
    	float federalTax=150.00f;
    	std::string GA="Gross Amount";
    	std::string FT="Federal Tax";
    	
    	std::cout<<std::setprecision(2)<<std::fixed<<std::right
    		<<GA<<std::setfill('.')<<std::setw(30-GA.length())
    		<<std::right<<" $"<<std::setfill(' ')<<std::setw(7)
    		<<grossAmount<<'\n'
    		<<FT<<std::setfill('.')<<std::setw(30-FT.length())
    		<<std::right<<" $"<<std::setfill(' ')<<std::setw(7)
    		<<federalTax<<std::endl;
    	
    	return 0;
    }
    make sure you actually understand what I did there... if not let me know I'll show you what I did
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  3. #3
    System Novice siavoshkc's Avatar
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    So really it has nothing to do with iostream. You should align it yourself.
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  4. #4
    Registered User major_small's Avatar
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    Quote Originally Posted by siavoshkc
    So really it has nothing to do with iostream. You should align it yourself.
    it has to do with iomanip... and you aren't aligning it yourself, you're using the context of the words around it to set the amount of spaces... aligning it yourself dynamically would take much more code...
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  5. #5
    System Novice siavoshkc's Avatar
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    aligning it yourself dynamically would take much more code...
    Can you please show me how? Thanks.
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  6. #6
    Frequently Quite Prolix dwks's Avatar
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    You'd need something like this:
    Code:
    length = number_to_string()
    print number_to_string
    print length-maxlength spaces
    etc
    dwk

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  7. #7
    Registered User major_small's Avatar
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    oi... I'll take a crack at it... yuck...
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  8. #8
    carry on JaWiB's Avatar
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    What about something like this:
    Code:
    outFile << left<< setfill('.')<< setw(15)<<"Gross Amount" << right << " $" << grossAmount << endl;
    outFile << left<< setfill('.')<< setw(15)<<"Federal Tax" << right << " $" << federalTax << endl;
    "Think not but that I know these things; or think
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  9. #9
    Registered User major_small's Avatar
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    please don't try to learn anything from this code...
    Code:
    #include <iostream>
    #include <sstream>
    #include <string>
    
    namespace My
    {
    	std::string setw(const int num, const double dub);
    	std::string retval;
    }
    
    int main()
    {
    	std::cout<<"Gross Amount............ $"<<My::setw(7,1000.00)<<'\n'
    		<<"Federal Tax............. $"<<My::setw(7,150.10)<<std::endl;
    
    	return 0;
    }
    
    std::string My::setw(const int num, const double dub)
    {
    	My::retval="";
    
    	std::stringstream ss;
    	ss<<dub;
    	if(dub-static_cast<int>(dub)<0.01)
    	{
    		ss<<".00";
    	}
    	else if(dub-static_cast<int>(dub)<0.10)
    	{
    		ss<<"0";
    	}
    	My::retval=ss.str();
    
    	for(int i=0; i<static_cast<int>(num-My::retval.length()); i++)
    	{
    		My::retval.insert(0," ");
    	}
    
    	return My::retval;
    }
    Last edited by major_small; 08-31-2006 at 05:42 PM.
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  10. #10
    Frequently Quite Prolix dwks's Avatar
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    Especially not how to code a code formatter . . .
    dwk

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  11. #11
    Registered User major_small's Avatar
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    Quote Originally Posted by dwks
    Especially not how to code a code formatter . . .
    yeah, yeah. you build me a better one.

    edit: there, happy?
    Last edited by major_small; 08-31-2006 at 05:42 PM.
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  12. #12
    System Novice siavoshkc's Avatar
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    It takes me some time to understand what you have written.
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  13. #13
    System Novice siavoshkc's Avatar
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    Thank you, I got it. I recently had a little problem with aligning that I solved it with your help.
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  14. #14
    Frequently Quite Prolix dwks's Avatar
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    Quote Originally Posted by major_small
    yeah, yeah. you build me a better one.

    edit: there, happy?
    Yes, because now I get to post the link for my (old) code formatter: http://dwks.theprogrammingsite.com/myprogs/codeform.htm

    dwk

    Seek and ye shall find. quaere et invenies.

    "Simplicity does not precede complexity, but follows it." -- Alan Perlis
    "Testing can only prove the presence of bugs, not their absence." -- Edsger Dijkstra
    "The only real mistake is the one from which we learn nothing." -- John Powell


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  15. #15
    Registered User major_small's Avatar
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    well then... thank you

    I may end up using yours... mine has an HTML output part too, but it doesn't work >.<
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