#include <iostream> using namespace std; int daytab[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} }; bool isLeapYear(int year) { return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0; } int main() { in...