scc

simple c99 compiler
git clone git://git.simple-cc.org/scc
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_newyear.c (166B)

      1 /*
      2  * Happy New Year!!!!
      3  */
      4 int
      5 _newyear(int year)
      6 {
      7 	int day;
      8 
      9 	year += 1900 - 1;
     10 	day = 1 + year + year/4;
     11 	day -= year/100;
     12 	day += year/400;
     13 
     14 	return day % 7;
     15 }