Online C++ Compiler Features
Advanced C++ Code Editor
- Monaco Editor with precise C++17 syntax highlighting for keywords, STL containers, and templates
- Intelligent autocomplete for C++ standard library functions, methods, and common algorithms
- Real-time detection of syntax errors, missing semicolons, and bracket mismatches
- Header file and namespace recognition—code like a professional C++ developer
High-Performance C++ Compilation
- Compile C++17 code using g++ compiler with optimization support
- Two-phase execution: compilation catches syntax and type errors, then runs your compiled binary
- See detailed compiler errors and warnings—learn proper C++ from helpful error messages
- Test performance-critical algorithms and data structure implementations instantly
STL & Modern C++ Support
- Full access to Standard Template Library: vector, map, set, queue, stack, and algorithms
- Use modern C++ features: auto keyword, range-based for loops, smart pointers, lambda expressions
- Practice C++ templates, function overloading, and operator overloading
- Test low-level memory operations, pointers, references, and manual memory management
Systems Programming & Learning
- Perfect for systems programming practice and understanding low-level computer operations
- Learn C++ for game development, competitive programming, or performance optimization
- Share C++ solutions to algorithm challenges on LeetCode, Codeforces, or HackerRank
- Test C++ code before integrating into larger projects or production systems
C++ Compiler Keyboard Shortcuts
Experience the power of Replit AI
This entire C++ compiler was built by Replit Agent 3 from a natural language prompt. Replit's environment facilitates rapid development, iteration and testing code for users of any technical ability. Develop software faster and better with Replit’s autonomous AI.
Get started freeFrequently Asked Questions
What C++ standard does this compiler support?
This online C++ compiler supports C++17, giving you modern language features like structured bindings, if constexpr, std::optional, std::variant, and filesystem library. Write contemporary C++ code with the latest syntax improvements.
Can I use C++ STL containers and algorithms?
Yes! Full Standard Template Library access including vector, map, set, queue, stack, priority_queue, and all STL algorithms (sort, binary_search, transform, etc.). Perfect for practicing data structures and competitive programming.
How does C++ compilation work in the browser?
Your C++ code is compiled using g++ compiler on the server, producing an executable binary. Compilation errors (syntax, type issues) appear first, then runtime output or errors. It's identical to local C++ development workflow.
Can I use pointers and manual memory management?
Absolutely! This C++ compiler supports pointers, references, dynamic memory allocation (new/delete), and manual memory management. Practice low-level programming, data structures like linked lists, and systems programming concepts.
Is this suitable for competitive programming?
Perfect for competitive programming! Test algorithms quickly, verify time complexity with different inputs, and share C++ solutions. Practice problems from Codeforces, LeetCode, or HackerRank with the same STL functions you'd use in contests.
What happens with infinite loops in C++?
The C++ compiler enforces a 30-second execution limit. Infinite loops are automatically terminated, preventing system hang. This safety measure ensures fair resource usage while providing ample time for complex algorithm execution.
Can I split code across multiple C++ files?
This online C++ compiler works with single-file programs. You can define multiple classes and functions in one file, but header files and separate translation units aren't supported. Perfect for algorithm practice and learning C++ concepts.
Does this support C++11/14 features?
Yes! C++17 includes all C++11 and C++14 features. Use auto, range-based loops, lambda expressions, smart pointers, move semantics, and constexpr. Write modern C++ code with full backward compatibility.
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