gistfile1.txt

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main()
{
time_t now = time(0);


struct tm* tm = localtime(&now);
int date[3] = {tm->tm_mon, tm->tm_mday, tm->tm_year};
//printf("%d\n", date[2]); 

// following the gregorian to julian day
int a = (14-(date[0]+1))/12;
int y = (date[2]+1900) + 4800 - a;
int m = date[0] + 12*a -3;

int JDN = date[1] + ((153*m + 2)/5) + 365*y + (y/4) - (y/100) + (y/400) - 32045;

int phase = (JDN - 2451550)%29; 
//going to determine the phase of the moon
if(phase < 2)
{
	printf("New Moon\n");
}

else if(phase < 6 )
{
	printf("Waxing Crescent\n");
}

else if(phase < 13)
{
	printf("First Quarter\n");
}
else if(phase < 17)
{
	printf("Full\n" );
}

else if (phase < 20)
{
	printf("Waning Gibbous\n");
}

else if(phase < 23)
{
	printf("Last Quarter\n" );
}

else if (phase < 28)
{
	printf("Waning Crescent\n" );
}

else 
{
	printf("New Moon\n");
}

}