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Questions - c++-chrono

How do we get a time duration in C++ since a given year?

How do we get a time duration in C++ since a given year? Can we do it with ctime or should we use chrono as well?
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christo

c++

c++-chrono

ctime

Votes: 0

Answers: 2

Latest Answer

With <chrono> in C++20: using namespace std::chrono; using namespace std::chrono_literals; const auto start = sys_days {2010y / January / 1}; const auto now = system_clock::now(); const auto d...
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konsolas

Create std::chrono::zoned_time from zone and time

I have a datetime in a platonic sense, i.e some date and time (like 18th of January 2022 15:15:00) and I know in which timezone it represent something, e.g "Europe/Moscow" I want to create s...
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RiaD

c++

timezone

c++-chrono

Votes: 0

Answers: 1

Latest Answer

#include <chrono> #include <iostream> int main() { using namespace std::literals; std::chrono::zoned_time zt{"Europe/Moscow", std::chrono::local_days{18d/std::ch...
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Howard Hinnant

C# to C++: Convert C# Time calculation to C++ chrono

I've got the task to convert some C# code to C++ and I've problems with chrono. Goal is to round a time to a variable time span. C#: int iRoundTo = 30; // can be 45 or other variable value, not a cons...
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Mighty

c#

c++

rounding

timespan

c++-chrono

Votes: 0

Answers: 2

Latest Answer

I'm doing a bit of guessing with this answer, but my guess is that you want to truncate the current time to the floor of the current half minute (in case of iRoundTo == 30). If I'm correct, this is ea...
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Howard Hinnant

std::chrono::system_clock + now() to milliseconds and back different behavior

I'm a bit puzzled to find a portable way to convert milliseconds to std::chrono::system_time::time_point. I looks like the code : https://godbolt.org/z/e7Pr3oxMT #include <chrono> #include <i...
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drus

c++

c++-chrono

Votes: 0

Answers: 1

Latest Answer

The problem is probably long duration = value.count(); The type long isn't necessarily 64 bits wide. The C++ standard does not define the exact size of integer types besides char. Visual Studio uses ...
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jwezorek

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