Online C++ Compiler & Runner (GCC C++17 / C++20)

🚀 Why Choose ToolPix Online C++ Compiler?

• ⚡ Fast GCC G++ Execution: Compile modern C++17 and C++20 programs in milliseconds with optimized binary output.
• 🤖 1-Click AI Error Fixing: Decipher complex compiler errors, template errors, and segmentation faults with automatic AI corrections.
• 📦 Complete STL Header Support: Use vector, map, set, string, algorithm, queue, and numeric effortlessly.
• ⌨️ Interactive Console Input: Take real-time user inputs via std::cin, scanf, and getline.
• 🏆 Ideal for Competitive Programming: Practice LeetCode, Codeforces, HackerRank, and interview algorithms without local setup.

📊 ToolPix vs Competitor C++ Compilers

What is C++?

C++ is a high-performance, cross-platform programming language created by Bjarne Stroustrup as an extension of the C language. It combines the efficiency of C with object-oriented features, making it the go-to language for game development, system software, and performance-critical applications.

Key Features of C++

• Object-Oriented: Supports classes, inheritance, polymorphism, and encapsulation.
• Standard Template Library (STL): A powerful set of C++ template classes to provide general-purpose classes and functions.
• Memory Management: Gives you full control over memory allocation and deallocation.
• High Performance: Compiles directly to machine code for maximum speed and efficiency.

C++ Code Examples

Explore the power of C++ with these examples. Click "Try Now" to see them run!

1. Hello World

The standard first program in C++.

#include <iostream>

int main() {
    std::cout << "Hello, World!" << std::endl;
    return 0;
}

2. Input and Output (cin/cout)

Reading input and printing output using standard streams.

#include <iostream>
using namespace std;

int main() {
    int age;
    cout << "Enter your age: ";
    cin >> age;
    cout << "You are " << age << " years old." << endl;
    return 0;
}

3. Object-Oriented Programming (Classes)

Creating a class and instantiating an object.

#include <iostream>
#include <string>
using namespace std;

class Car {
  public:
    string brand;
    string model;
    int year;

    void displayInfo() {
        cout << year << " " << brand << " " << model << endl;
    }
};

int main() {
    Car myCar;
    myCar.brand = "Tesla";
    myCar.model = "Model S";
    myCar.year = 2026;

    myCar.displayInfo();
    return 0;
}

4. Using Vectors (STL)

Dynamic arrays using the Standard Template Library.

#include <iostream>
#include <vector>
using namespace std;

int main() {
    vector<string> langs = {"C++", "Python", "Java"};
    langs.push_back("JavaScript");

    cout << "Languages:" << endl;
    for (string lang : langs) {
        cout << "- " << lang << endl;
    }
    return 0;
}

Frequently Asked Questions (FAQ)

Is this C++ compiler free?

Yes, ToolPix provides a completely free online C++ compiler with no restrictions.

Do I need to install a compiler?

No, we handle the compilation on our servers using G++, so you can code directly in your browser.

Can I use the STL?

Yes, full support for the Standard Template Library (STL) is included, allowing you to use vectors, maps, lists, and algorithms.

Does it support C++11/14/17?

Yes, our compiler supports modern C++ standards, enabling you to use features like auto, lambda expressions, and smart pointers.

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