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Online C++ Code Editor for Interviews

CodeInterview's Online C++ Code Editor has been designed with collaboration in mind, our platform empowers both interviewers and candidates to interact seamlessly in real-time.

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Conduct Real-time Technical Interviews in C++ for Free

Online C++ Editor at CodeInterview

Getting Started with Our C++ Code Editor

In CodeInterview, you have the flexibility to work with C++ in the way that best suits your needs. If you want to conduct an interview with some programming problems, we offer a single-file C++ environment. However, to ensure a thorough and job-relevant interview, we provide a multi-file C++ project environment. Learn more below.

Single-file C++ Environment

The single-file C++ environment simplifies technical interviews by focusing on core programming skills and quick problem-solving tasks.

This environment runs C++ 17 with GCC 8.3.0.

The code is invoked using g++-8 -std=c++17 -pthread

Single-file C++ environment comes with the following installed Libraries:

  • Boost: A collection of peer-reviewed, portable C++ source libraries that work well with the C++ Standard Library, providing solutions for common tasks and challenges.
  • Catch2: A multi-paradigm test framework for C++, supporting both behavior-driven development (BDD) and test-driven development (TDD) approaches, making unit testing easy and efficient.
  • nlohmann_json: A JSON library for C++ that provides a simple and intuitive way to parse, serialize, and manipulate JSON data.

Here is a simple example of how you can use Boost here:

#include <iostream>
#include <boost/date_time/posix_time/posix_time.hpp>

int main() {
    using namespace boost::posix_time;
    using namespace boost::gregorian;

    // Create date and time objects
    ptime pt(date(2024, May, 16), hours(2) + minutes(30));

    // Output date and time
    std::cout << "Date and Time: " << pt << std::endl;

    // Add 1 hour to the time
    ptime new_pt = pt + hours(1);
    std::cout << "New Date and Time: " << new_pt << std::endl;

    return 0;

Multi-file C++ Project Environment

This environment runs C++20 with GCC 9.4.0.

Our C++ multifile environment leverages Conan for dependency management. Conan is a popular C++ package manager that simplifies the process of installing and managing libraries in C++ projects.

Execution Workflow

Whenever you start the environment, we provide a simple conanfile.txt with a couple of libraries pre-installed. We also provide the execution environment via CMake. The command to configure, build, and run your project is mentioned in the ci-config.json file.

Mult-file C++ Project environment comes with the following installed Libraries:

  • fmt: A modern formatting library for C++, providing fast and safe string formatting similar to Python's str.format().
  • nlohmann_json: A JSON library for C++ that provides a simple and intuitive way to parse, serialize, and manipulate JSON data.

Amazing Candidate Experience

At CodeInterview, our C++ Online IDE and Code Editor enhance candidate experiences. The flexibility allows candidates to efficiently showcase their skills in a user-friendly environment, ensuring a seamless and delightful interview process.

Get started with CodeInterview now

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