Solved: show time elapsed

As a developer, it’s important to find ways in making our applications user-friendly. One such method is including a feature that shows the elapsed time, beneficial in knowing the duration of processes. This feature can be crucial in task timing, games or any software that requires time tracking. C++ is a perfect language for this due to its extensive libraries that handle time.

C++ chrono Library

The C++ chrono library is a versatile library designed for time manipulation. It provides various functionalities related to duration, clock, and time point. One of the assets of this library is the ability to measure the elapsed time. It is a part of the C++ Standard Library.

The solution to finding the elapsed time includes setting two time points. The first one before the task and the second one after the task. The difference between the two gives us the elapsed time.


int main() {
auto start = std::chrono::high_resolution_clock::now();

// Perform task here

auto stop = std::chrono::high_resolution_clock::now();

auto duration = std::chrono::duration_cast(stop – start);

std::cout << "Time elapsed : " << duration.count() << " seconds" << endl; return 0; } [/code] The "chrono::high_resolution_clock::now()" function gives the current time. To calculate the time duration, we subtract the start time from the stop time.

Understanding C++ Code

The magic of C++ begins with “#include and “. These are preprocessors that tell the compiler to include these libraries. iostream is necessary for console input and output, and chrono allows us to use its time functions.

  • The ‘auto’ keyword allows the compiler to automatically determine the type of the variable at compile time.
  • The execution of the task happens between the start and stop time point.
  • Later, we find the duration by taking the difference between the stop and start using the “duration_cast” function.
  • Finally, we display the time in seconds using the count() function of the duration object.

Other Time Libraries in C++

Although the chrono library is often the most suitable for time management, C++ offers other libraries such as ctime and time.h. However, they don’t provide the same accuracy and flexibility as chrono.

Understanding the utilization of such libraries can give us deeper control over our code, making our software versatile and efficient.

In conclusion, measuring elapsed time in C++ is a relatively simple and efficient process. By using the tools provided by the library, we can create user-friendly and multifaceted applications. Remember, effective time management is the key to a successful application, and C++ has got us covered for it.

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