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C++: Last Friday of Each Month

Bjarne-stroustrup
 


Write a program or a script that returns the last Fridays of each month of a given year.

The year may be given through any simple input method in your language (command line, std in, etc.).

Example of an expected output:

./last_fridays 2012
2012-01-27
2012-02-24
2012-03-30
2012-04-27
2012-05-25
2012-06-29
2012-07-27
2012-08-31
2012-09-28
2012-10-26
2012-11-30
2012-12-28

#include <boost/date_time/gregorian/gregorian.hpp>
#include <iostream>
#include <cstdlib>
 
int main( int argc , char* argv[ ] ) {
   using namespace boost::gregorian ;
 
   greg_month months[ ] = { Jan , Feb , Mar , Apr , May , Jun , Jul ,
      Aug , Sep , Oct , Nov , Dec } ;
   greg_year gy = atoi( argv[ 1 ] ) ;
   for ( int i = 0 ; i < 12 ; i++ ) {
      last_day_of_the_week_in_month lwdm ( Friday , months[ i ] ) ;
      date d = lwdm.get_date( gy ) ;
      std::cout << d << std::endl ;
   }
   return 0 ;
}
Output:
2012-Jan-27
2012-Feb-24
2012-Mar-30
2012-Apr-27
2012-May-25
2012-Jun-29
2012-Jul-27
2012-Aug-31
2012-Sep-28
2012-Oct-26
2012-Nov-30
2012-Dec-28

SOURCE

Content is available under GNU Free Documentation License 1.2.