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Justification

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Join Date: Apr 2007

Posts: 110

Reputation: kylcrow is an unknown quantity at this point

Solved Threads: 2

kylcrow

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Junior Poster

Justification

May 14th, 2007

How would one right justify a string with a width of 4 and store it in a variable without being able to use cout? If that is even possible.

Last edited by kylcrow; May 14th, 2007 at 11:53 am.

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Join Date: Sep 2004

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Narue

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Code Goddess

Re: Justification

May 14th, 2007

You need to know how long the string is, and how wide the available field space is. Then take the difference of that and if it's greater than 0, prepend that number of spaces onto the string:

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#include <iostream>
#include <iomanip>
#include <string>
 
std::string right_justify ( const std::string& s, std::string::size_type field_width )
{
  std::string::difference_type whitespace = field_width - s.size();
 
  if ( whitespace > 0 )
    return std::string ( whitespace, ' ' ) + s;
 
  return s;
}
 
int main()
{
  const int N = 10;
 
  std::cout<< std::right << std::setfill ( ' ' ) << std::setw ( N ) << "12345" <<'\n';
  std::cout<< right_justify ( "12345", N ) <<'\n';
}
#include <iostream>
#include <iomanip>
#include <string>

std::string right_justify ( const std::string& s, std::string::size_type field_width )
{
  std::string::difference_type whitespace = field_width - s.size();

  if ( whitespace > 0 )
    return std::string ( whitespace, ' ' ) + s;

  return s;
}

int main()
{
  const int N = 10;

  std::cout<< std::right << std::setfill ( ' ' ) << std::setw ( N ) << "12345" <<'\n';
  std::cout<< right_justify ( "12345", N ) <<'\n';
}