c语言编程之三天打鱼两天晒网答:include <stdio.h> define MAX 100 define leap(y) (y%4==0 && y%100!=0 || y%400==0)struct d{int y,m,d;};long days(struct d d1,struct d d2){ int mon[2][13]= {{0,31,28,31,30,31,30,31,31,30,31,30,31},{0,31,29,31,30,31,30,31,31,30,31,30,31...