CODEWITHSUNDEEP
c++datetime
Tomsta
Tomsta

Reputation: 131

Get/Set Date and Time in C++

for a project at uni i'm doing Home Automation, i need to be able to get date and time as well as setting both of them, i need this for automatic activations of certain functions, currently after seraching the web i have these for setting date and time

Date:

char date[9];
_strdate(date);
std::cout << date << std::endl;

Time:

time_t timer;
    struct tm y2k;
    double seconds;

    y2k.tm_hour = 0;   y2k.tm_min = 0; y2k.tm_sec = 0;
    y2k.tm_year = 100; y2k.tm_mon = 0; y2k.tm_mday = 1;

    time(&timer);  /* get current time; same as: timer = time(NULL)  */

    seconds = difftime(timer,mktime(&y2k));

    std::cout<<" seconds since January 1, 2000 in the current timezone" << seconds << std::endl;

What i want to know is is there a better way to do both of these, also how do i set the date and time?

Upvotes: 1

Views: 10575

Answers (2)

Eitan Myron
Eitan Myron

Reputation: 159

Rather than declaring a struct, declare a class. That way, you can declare all of your data points within, and use getter and setter functions to modify and print them. Write it like this:

class y2k
{
    // Private variables
    int tm_hour;
    int tm_year;
    int tm_min;
    int tm_mon;
    int tm_sec;
    int tm_mday;
public:
    // Getters
    int getHour() {return tm_hour;}
    int getYear() {return tm_year;}
    int getMin() {return tm_min;}
    int getMon() {return tm_mon;}
    int getSec() {return tm_sec;}
    int getMDay() {return tm_mday;}

    // Setters
    void setHour(int hour) {hour = tm_hour;}
    void setYear(int year) {year = tm_year;}
    void setMin(int min) {min = tm_min;}
    void setMon(int mon) {mon = tm_mon;}
    void setSec(int sec) {sec = tm_sec;}
    void setMDay(int mday) {mday = tm_mday;}
};

Use the getters if you choose to print the value to the screen, and the setters if you want to set the data. For instance, if you declared y2k foo, then you could set the year like so: foo.setYear(100).

Upvotes: 0

6EQUJ5
6EQUJ5

Reputation: 3302

If you want your date/time code to be portable you might want to consider a library like the Boost date/time library.

This will also give you the ability to do calculations and work with time intervals, etc. and you can concentrate on writing your own code instead of a library of custom date time methods and classes.

There are some contrived examples at http://www.boost.org/doc/libs/1_55_0/doc/html/date_time/examples/general_usage_examples.html

Upvotes: 1

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