c++ get microseconds since epoch

To get the number of microseconds since the epoch in C++, you can use the std::chrono library. Here is the step-by-step explanation:

  1. Include the necessary header file: 
#include <chrono>

This header file provides the functionality for working with time durations and points in time.

  1. Use the std::chrono namespace:
using namespace std::chrono;

This allows you to use the types and functions from the std::chrono library without explicitly specifying the namespace each time.

  1. Get the current time point:
auto now = high_resolution_clock::now();

The high_resolution_clock::now() function returns the current time point, which represents the current moment in time.

  1. Convert the time point to microseconds since the epoch:
auto microseconds = duration_cast<microseconds>(now.time_since_epoch());

The time_since_epoch() function returns the duration between the current time point and the epoch (January 1, 1970). The duration_cast<microseconds> function converts this duration to microseconds.

  1. Access the number of microseconds:
auto microsecondsCount = microseconds.count();

The count() function returns the number of microseconds as a long long integer.

Here's the complete code snippet:

#include <chrono>

using namespace std::chrono;

int main() {
    auto now = high_resolution_clock::now();
    auto microseconds = duration_cast<microseconds>(now.time_since_epoch());
    auto microsecondsCount = microseconds.count();

    // Use the microsecondsCount value as needed

    return 0;
}

This code will give you the number of microseconds since the epoch in the microsecondsCount variable, which you can use for further calculations or display purposes.