const bool Date::isValidDate() const
{
if(year<1)
return false;
if(!isValidMonth())
return false;
if(day>daysInMonth(month))
return false;
return true;
}
int main( int argc, char *argv[] ){
/*******************************************************************************
main function
*******************************************************************************/
int month, year, daycode;
int time_systimeyear = 2016, time_systimemonth = 5;
if( argc == 1 ){
month = time_systimemonth;
year = time_systimeyear;
// printf("Compute the current month...\n");
daycode = getDaycode(year);
isLeapYear(year);
displayCalendar(year, month, daycode);
/*
insert code for computing the current month
*/
}
else if( argc == 2 ){
if( strcmp(argv[1], "-m") == 0 ){
printf("cal missing argument for option -m.\n");
}
else if( strcmp(argv[1], "-y") == 0 ){
month = 0;
year = time_systimeyear;
// printf("Compute the current year...\n");
daycode = getDaycode(year);
isLeapYear(year);
displayCalendar(year, month, daycode);
/*
insert code for computing the current year
*/
}
else{
printf("cal: Invalid argument '%s'\n", argv[1]);
}
}
else if( argc == 3 ){
if( strcmp(argv[1], "-m") == 0 ){
month = isValidMonth(argv[2]);
if( month ){
year = time_systimeyear;
daycode = getDaycode(year);
isLeapYear(year);
displayCalendar(year, month, daycode);
// printf("Compute the month of current year...\n");
/*
insert code for computing month of current year
*/
}
else{
printf("cal: invalid argument '%s'\n", argv[2]);
}
}
else if( strcmp(argv[1], "-y") == 0 ){
year = atoi(argv[2]);
if( year == 0 ) printf("cal: invalid argument '%s'\n", argv[2]);
else if( year > 9999 || year < 1) printf("cal: year `%d' not in range 1..9999\n", year);
else if( year >= 1 && year <= 9999 ){
month = 0;
daycode = getDaycode(year);
isLeapYear(year);
displayCalendar(year, month, daycode);
// printf("Compute the year...\n");
/*
insert code for computing the year
*/
}
else{
printf("cal: invalid argument '%s'\n", argv[2]);
}
}
else{
printf("cal: invalid argument '%s'\n", argv[1]);
}
}
else{
printf("cal: invalid number of arguments\n");
}
}// end of main
