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|    BATPOWER    |    Batch Language Programming    |    216 messages    |
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|    Message 73 of 216    |
|    Richard Webb to Paul Quinn    |
|    another convoluted brainteaser for the g    |
|    08 Feb 12 13:57:33    |
   
   HI Paul,   
      
   On Wed 2012-Feb-08 15:22, Paul Quinn (3:640/384) wrote to Mark Lewis:   
      
   PQ> Hi! mark,   
      
    RW>> edit it for leap years, since by default it assumes February has    
    RW>> 28 days.    
      
    ml> you know that you can automatically handle this with a small bit of   
    ml> math, right? i'd have to look at some code to make sure i state it   
    ml> correctly but leap years can be determined by current year div 4 but   
    ml> there's also a 400 involved...   
      
   PQ> I think the 400 test is for century years, like: 1900, 2000, 2100 &   
   PQ> so on.    
      
   Think you might be right, I'm pre coffee at the moment but   
   that sounds right.   
      
    ml> this is why i need to take a sec later   
    ml> on and look at the real formula... then you can have an array with   
    ml> all of the month days count and automatically adjust FEB when it has   
    ml> 29 days ;)   
      
   PQ> How about a bit of something in some old Turbo-C...   
      
   PQ> --- 8< ---   
   PQ> int leap_yr_test(int test_yr)   
   PQ> /*   
   PQ> function determines if a given year is a leap year   
   PQ> Uses: 'test_yr' which is defined prior to function call   
   PQ> Pre: none   
   PQ> Post: a boolean value is returned indicating TRUE/FALSE   
   PQ> */   
   PQ> {   
   PQ> /* local variables */   
   PQ> int result = FALSE;   
      
   Ah so if one were to compile that does it give you an   
   errorlevel if true and another if false?   
   test_yr easy to define, especially as an environment   
   variable as in   
   logecho $C$Y | nset test_yr=$1   
   USes HOrst's logecho and nset.   
      
   PQ> switch (test_yr % 100)   
   PQ> {   
   PQ> case 0 : if ((test_yr % 400) == 0) result = TRUE; break;    
   PQ> default : if ((test_yr % 4) == 0) result = TRUE;   
   PQ> }   
   PQ> /* end switch. */   
   PQ> return(result);   
   PQ> }   
   PQ> /* end function. */   
   PQ> --- 8< ---   
      
   PQ> =:)   
      
   INteresting!   
      
   Regards,   
    Richard   
   ---   
    * Origin: (1:116/901)   
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