question about using ctime

[progstuff]

How do I use the library ctime to set the current time in: seconds, hours (24 hour), minutes into separate integers.

And how do i do the same thing with dates setting the current year, day , month into separate integers.

This is so i can use them to use the integers instead of user input and the user typing in the date themselves.
In c++.

[Banfa]

Read the ctime reference. There are only 9 functions so it should take you long to find the one you need.

[progstuff]

I think i found it. struct tm right?

#include <stdio.h>
#include <time.h>
 
int main ()
{
  time_t rawtime;
  struct tm * timeinfo;
 
  time ( &rawtime );
  timeinfo = localtime ( &rawtime );
  printf ( "Current local time and date: %s", asctime (timeinfo) );
 
  return 0;
}

this is a dumb question...
i dont see how to implement a "tm structure" as the return value

[whodgson]

Your code works fine and is probably as you intended

#include<iostream>//added
#include <stdio.h>
#include <time.h>
using namespace std; //added
 
int main ()
{
  time_t rawtime;
  struct tm * timeinfo;
 
  time ( &rawtime );
  timeinfo = localtime ( &rawtime );
  printf ( "Current local time and date: %s", asctime (timeinfo) );
  cout<<"\n";
 
 char q;
 cout<<"Press any key to continue...";
 cin>>q;
 return 0;//these last 4 added
}

printed: Current local time and date: Thu Jan 14 13:14:01 2010
Press any key to continue.

[progstuff]

sorry that was example code from cplusplus reference... i dont think you read my first post...
im trying to say, and i quote myself

How do I use the library ctime to set the current time in: seconds, hours (24 hour), minutes into separate integers.

And how do i do the same thing with dates setting the current year, day , month into separate integers.

The example was the function i was going to use but i dont quite know how to use it...
i need to refine that code to fit my needs hence the quote.

i know no matter what function it is i need to use struct tm
p.s. read the quote

[Banfa]

My answer would probably be only convert to struct tm as required (i.e. locally to any given function), pass the time around as a time_t.

Is this C or C++.

If it is C++ you can always just return a struct tm. Note don't return the struct tm* pointer because that points to static data it would be overwritten on the next call to localtime (or gmtime). Return *timeinfo.

In C returning structures is generally considered bad practice. Good C practice is to pass in a pointer to an already allocated block of data and let the called function fill it in. You could do that with struct tm.