... dates to be searched.#define IYEND 2000int main(void) /* Program badluk */{void flmoon(int n, int nph, long *jd, float *frac);long julday(int mm, int id, int iyyy);int ic,icon,idwk,im,iyyy,n;float ... that task, giving incidentally all other Fridays the 13th as a by-product.#include <stdio.h>#include <math.h>#define ZON -5.0 Time zone −5 is Eastern Standard Time.#define IYBEG 1900 ... representations in most programming languages. You should learnto think about your programming tasks, insofar as possible, exclusively in terms ofthese standard control structures. In writing programs,...