mrgame64

//uncomment the line below to use 'double', or else leave it commented to use 'float'
//#define DOUBLE_PREC

#ifdef DOUBLE_PREC
typedef double fp;
#else
typedef float fp;
#endif

//use 'fp' instead of 'float' or 'double' in your code

mrgame64

Source:
	Almanac for Computers, 1990
	published by Nautical Almanac Office
	United States Naval Observatory
	Washington, DC 20392

Inputs:
	day, month, year:      date of sunrise/sunset
	latitude, longitude:   location for sunrise/sunset
	zenith:                Sun's zenith for sunrise/sunset