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metallurgix/day.c

Created August 11, 2014 22:12
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Day of the Week using Date
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day.c
#include <stdio.h>
char* cal_day(int y, int m, int d)
{
char* days[]={"Sunday","Monday","Tuesday","Wednesday","Thursday", "Friday","Saturday"};
int a=(14-m)/12;
y=y-a;
m=m+12*a-2;
return days[ (d + y + y/4 - y/100 + y/400 + (31*m)/12) % 7];
}
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