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Non-blocking Console Input in C : A Multipurpose Solution
In the realm of C programming, the ability to handle non-blocking console input is crucial, especially when creating applications that demand continuous user interaction even while executing time-consuming tasks. This article presents a comprehensive solution using modern C techniques and external libraries, leveraging a permissive license for enhanced flexibility.
Approaches and Considerations
C offers several approaches to achieve non-blocking console input, each with its own advantages and considerations:
The choice of approach depends on the specific needs and preferences of the programmer. For a simpler and more straightforward solution, the C 11 threading model is a suitable option.
Example: Implementing Non-blocking Console Input with C 11
The following code snippet demonstrates non-blocking console input using the C 11 threading model:
<code class="cpp">#include <iostream> #include <future> #include <thread> #include <chrono> static std::string getAnswer() { std::string answer; std::cin >> answer; return answer; } int main() { std::chrono::seconds timeout(5); std::cout << "Do you even lift?" << std::endl << std::flush; std::string answer = "maybe"; //default to maybe std::future<std::string> future = std::async(getAnswer); if (future.wait_for(timeout) == std::future_status::ready) answer = future.get(); std::cout << "the answer was: " << answer << std::endl; exit(0); }</code>
In this example:
Conclusion
The non-blocking console input paradigm empowers C programmers to develop interactive applications that seamlessly handle user commands and perform background tasks simultaneously. The provided approaches offer varying levels of complexity and functionality, allowing programmers to select the solution that best suits their requirements.
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