#include<stdio.h> void NextDay(int &year,int &month,int &day){ int dayOfMonth[]={0,31,28,31,30,31,30,31,31,30,31,30,31}; if(year%400==0||year%4==0&&year%100!=0){ dayOfMonth[2]=29; } ++day; if(day>dayOfMonth[month]){ day=1; ++month; } if(month>12){ month=1; ++year; } /...