Future date

[wellhello]

I want to use difftime to count days between today and the day in the future. I don't know how to do the latter. I've tried time_t future = time(???) where '???' would be date chosen by me, but I don't know what to write inside the bracket. I also tried to do separate struct:

  	struct tm
{
    int tm_mday=1; 
    int tm_mon=4; 
    int tm_year=116;
}

and then create a one time_t variable from it, but I failed. Is there any easy way?

Sorry for my english

[Shadowwolf]

The easiest way is to first the struct tm structure completely with the date you want to count the time to:

struct tm time = {}; //Zero initialize the structure
time.tm_mday = 1;
time.tm_mon = 4;
time.tm_year = 116;

Now you can use the mktime function to create a time_t from this structure. Like so:

time_t future_time = mktime(&time);

Next you can calculate the difference using whatever function you were using. For example, to calculate the number of seconds between the future date and now, you could try:

double difference = difftime(future_time, current_time); //current_time is your current date