Get start of day timestamp c++
1
I need to get timestamp in c++. I've found some functions in chrono for example:
std::chrono::system_clock::now()
But it's returning current time. How to get timestamp for a day? I mean the time that represents 00:00:00 of today and the same for yesterday? I'm very new to c++..
c++ time timestamp chrono
edited Nov 23 at 7:52
BluesSolo
481415
asked Nov 23 at 7:43
Karl Starter
83
add a comment |
1
I need to get timestamp in c++. I've found some functions in chrono for example:
std::chrono::system_clock::now()
But it's returning current time. How to get timestamp for a day? I mean the time that represents 00:00:00 of today and the same for yesterday? I'm very new to c++..
c++ time timestamp chrono
edited Nov 23 at 7:52
BluesSolo
481415
asked Nov 23 at 7:43
Karl Starter
83
3
So, why'd you tag c?
– Sourav Ghosh
Nov 23 at 7:46
Possible duplicate of portable way to create a timestamp in c/c++
– kebs
Nov 23 at 8:21
Check out this answer: stackoverflow.com/a/51456449/193789
– kebs
Nov 23 at 8:22
add a comment |
1
1
1
I need to get timestamp in c++. I've found some functions in chrono for example:
std::chrono::system_clock::now()
But it's returning current time. How to get timestamp for a day? I mean the time that represents 00:00:00 of today and the same for yesterday? I'm very new to c++..
c++ time timestamp chrono
edited Nov 23 at 7:52
BluesSolo
481415
asked Nov 23 at 7:43
Karl Starter
83
I need to get timestamp in c++. I've found some functions in chrono for example:
std::chrono::system_clock::now()
But it's returning current time. How to get timestamp for a day? I mean the time that represents 00:00:00 of today and the same for yesterday? I'm very new to c++..
c++ time timestamp chrono
c++ time timestamp chrono
edited Nov 23 at 7:52
BluesSolo
481415
asked Nov 23 at 7:43
Karl Starter
83
edited Nov 23 at 7:52
BluesSolo
481415
asked Nov 23 at 7:43
Karl Starter
83
edited Nov 23 at 7:52
BluesSolo
481415
edited Nov 23 at 7:52
BluesSolo
481415
edited Nov 23 at 7:52
BluesSolo
481415
481415
asked Nov 23 at 7:43
Karl Starter
83
asked Nov 23 at 7:43
Karl Starter
83
asked Nov 23 at 7:43
Karl Starter
83
83
3
So, why'd you tag c?
– Sourav Ghosh
Nov 23 at 7:46
Possible duplicate of portable way to create a timestamp in c/c++
– kebs
Nov 23 at 8:21
Check out this answer: stackoverflow.com/a/51456449/193789
– kebs
Nov 23 at 8:22
add a comment |
3
So, why'd you tag c?
– Sourav Ghosh
Nov 23 at 7:46
Possible duplicate of portable way to create a timestamp in c/c++
– kebs
Nov 23 at 8:21
Check out this answer: stackoverflow.com/a/51456449/193789
– kebs
Nov 23 at 8:22
3
3
So, why'd you tag c?
– Sourav Ghosh
Nov 23 at 7:46
So, why'd you tag c?
– Sourav Ghosh
Nov 23 at 7:46
Possible duplicate of portable way to create a timestamp in c/c++
– kebs
Nov 23 at 8:21
Possible duplicate of portable way to create a timestamp in c/c++
– kebs
Nov 23 at 8:21
Check out this answer: stackoverflow.com/a/51456449/193789
– kebs
Nov 23 at 8:22
Check out this answer: stackoverflow.com/a/51456449/193789
– kebs
Nov 23 at 8:22
add a comment |
1 Answer
1
active
oldest
votes
1
I think, you just need date, without time. So, you can get it like this:
#include <chrono>
#include <ctime>
#include <iomanip>
#include <iostream>
using namespace std;
int main()
{
auto curr = std::chrono::system_clock::now();
auto tm = std::chrono::system_clock::to_time_t(curr);
cout << std::put_time(std::localtime(&tm), "%d.%m.%Y");
}
and, of course, you can forcibly reset the fields of time, if you need:
auto curr = std::chrono::system_clock::now();
time_t tm = std::chrono::system_clock::to_time_t(curr);
auto lt = std::localtime(&tm);
lt->tm_hour = 0;
lt->tm_min = 0;
lt->tm_sec = 0;
cout << lt->tm_mday << "." << lt->tm_mon + 1 << "." << lt->tm_year + 1900 << endl;
answered Nov 23 at 7:54
snake_style
1,171310
thank you! Do you know how to get localtime of yesterday?
– Karl Starter
Nov 23 at 9:44
tm = tm - (24*60*60); auto lt = std::localtime(&tm);
– snake_style
Nov 23 at 9:53
cool! and the last question, how to convert it to unix timestamp?
– Karl Starter
Nov 23 at 10:11
tm this is it. It stores timestamp as seconds since 1970
– snake_style
Nov 23 at 10:54
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
I think, you just need date, without time. So, you can get it like this:
#include <chrono>
#include <ctime>
#include <iomanip>
#include <iostream>
using namespace std;
int main()
{
auto curr = std::chrono::system_clock::now();
auto tm = std::chrono::system_clock::to_time_t(curr);
cout << std::put_time(std::localtime(&tm), "%d.%m.%Y");
}
and, of course, you can forcibly reset the fields of time, if you need:
auto curr = std::chrono::system_clock::now();
time_t tm = std::chrono::system_clock::to_time_t(curr);
auto lt = std::localtime(&tm);
lt->tm_hour = 0;
lt->tm_min = 0;
lt->tm_sec = 0;
cout << lt->tm_mday << "." << lt->tm_mon + 1 << "." << lt->tm_year + 1900 << endl;
answered Nov 23 at 7:54
snake_style
1,171310
thank you! Do you know how to get localtime of yesterday?
– Karl Starter
Nov 23 at 9:44
tm = tm - (24*60*60); auto lt = std::localtime(&tm);
– snake_style
Nov 23 at 9:53
cool! and the last question, how to convert it to unix timestamp?
– Karl Starter
Nov 23 at 10:11
tm this is it. It stores timestamp as seconds since 1970
– snake_style
Nov 23 at 10:54
add a comment |
1
I think, you just need date, without time. So, you can get it like this:
#include <chrono>
#include <ctime>
#include <iomanip>
#include <iostream>
using namespace std;
int main()
{
auto curr = std::chrono::system_clock::now();
auto tm = std::chrono::system_clock::to_time_t(curr);
cout << std::put_time(std::localtime(&tm), "%d.%m.%Y");
}
and, of course, you can forcibly reset the fields of time, if you need:
auto curr = std::chrono::system_clock::now();
time_t tm = std::chrono::system_clock::to_time_t(curr);
auto lt = std::localtime(&tm);
lt->tm_hour = 0;
lt->tm_min = 0;
lt->tm_sec = 0;
cout << lt->tm_mday << "." << lt->tm_mon + 1 << "." << lt->tm_year + 1900 << endl;
answered Nov 23 at 7:54
snake_style
1,171310
thank you! Do you know how to get localtime of yesterday?
– Karl Starter
Nov 23 at 9:44
tm = tm - (24*60*60); auto lt = std::localtime(&tm);
– snake_style
Nov 23 at 9:53
cool! and the last question, how to convert it to unix timestamp?
– Karl Starter
Nov 23 at 10:11
tm this is it. It stores timestamp as seconds since 1970
– snake_style
Nov 23 at 10:54
add a comment |
1
1
1
I think, you just need date, without time. So, you can get it like this:
#include <chrono>
#include <ctime>
#include <iomanip>
#include <iostream>
using namespace std;
int main()
{
auto curr = std::chrono::system_clock::now();
auto tm = std::chrono::system_clock::to_time_t(curr);
cout << std::put_time(std::localtime(&tm), "%d.%m.%Y");
}
and, of course, you can forcibly reset the fields of time, if you need:
auto curr = std::chrono::system_clock::now();
time_t tm = std::chrono::system_clock::to_time_t(curr);
auto lt = std::localtime(&tm);
lt->tm_hour = 0;
lt->tm_min = 0;
lt->tm_sec = 0;
cout << lt->tm_mday << "." << lt->tm_mon + 1 << "." << lt->tm_year + 1900 << endl;
answered Nov 23 at 7:54
snake_style
1,171310
I think, you just need date, without time. So, you can get it like this:
#include <chrono>
#include <ctime>
#include <iomanip>
#include <iostream>
using namespace std;
int main()
{
auto curr = std::chrono::system_clock::now();
auto tm = std::chrono::system_clock::to_time_t(curr);
cout << std::put_time(std::localtime(&tm), "%d.%m.%Y");
}
and, of course, you can forcibly reset the fields of time, if you need:
auto curr = std::chrono::system_clock::now();
time_t tm = std::chrono::system_clock::to_time_t(curr);
auto lt = std::localtime(&tm);
lt->tm_hour = 0;
lt->tm_min = 0;
lt->tm_sec = 0;
cout << lt->tm_mday << "." << lt->tm_mon + 1 << "." << lt->tm_year + 1900 << endl;
answered Nov 23 at 7:54
snake_style
1,171310
edited Nov 23 at 8:03
answered Nov 23 at 7:54
snake_style
1,171310
answered Nov 23 at 7:54
snake_style
1,171310
answered Nov 23 at 7:54
snake_style
1,171310
1,171310
thank you! Do you know how to get localtime of yesterday?
– Karl Starter
Nov 23 at 9:44
tm = tm - (24*60*60); auto lt = std::localtime(&tm);
– snake_style
Nov 23 at 9:53
cool! and the last question, how to convert it to unix timestamp?
– Karl Starter
Nov 23 at 10:11
tm this is it. It stores timestamp as seconds since 1970
– snake_style
Nov 23 at 10:54
add a comment |
thank you! Do you know how to get localtime of yesterday?
– Karl Starter
Nov 23 at 9:44
tm = tm - (24*60*60); auto lt = std::localtime(&tm);
– snake_style
Nov 23 at 9:53
cool! and the last question, how to convert it to unix timestamp?
– Karl Starter
Nov 23 at 10:11
tm this is it. It stores timestamp as seconds since 1970
– snake_style
Nov 23 at 10:54
thank you! Do you know how to get localtime of yesterday?
– Karl Starter
Nov 23 at 9:44
thank you! Do you know how to get localtime of yesterday?
– Karl Starter
Nov 23 at 9:44
tm = tm - (24*60*60); auto lt = std::localtime(&tm);
– snake_style
Nov 23 at 9:53
tm = tm - (24*60*60); auto lt = std::localtime(&tm);
– snake_style
Nov 23 at 9:53
cool! and the last question, how to convert it to unix timestamp?
– Karl Starter
Nov 23 at 10:11
cool! and the last question, how to convert it to unix timestamp?
– Karl Starter
Nov 23 at 10:11
tm this is it. It stores timestamp as seconds since 1970
– snake_style
Nov 23 at 10:54
tm this is it. It stores timestamp as seconds since 1970
– snake_style
Nov 23 at 10:54
add a comment |
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3
So, why'd you tag c?
– Sourav Ghosh
Nov 23 at 7:46
Possible duplicate of portable way to create a timestamp in c/c++
– kebs
Nov 23 at 8:21
Check out this answer: stackoverflow.com/a/51456449/193789
– kebs
Nov 23 at 8:22