#153 · Programming Language Tools Developer Tool

C++ Checker

Run a fast browser-side check on C++ source before compiling. The checker identifies delimiter imbalance, dangerous C functions, suspicious memory-management combinations, duplicate includes, main signature issues, and other common risks.

Developer Input

Local browser processing

C++ Source Code

#include <iostream>
#include <memory>
#include <vector>

class Worker {
public:
    virtual ~Worker() = default;
    void run(const std::vector<int>& values) {
        for (const auto& value : values) {
            std::cout << value << '\n';
        }
    }
};

int main() {
    auto worker = std::make_unique<Worker>();
    worker->run({1, 2, 3});
    return 0;
}

Check Profile

Warning limit

items

Normalize outer whitespace Remove repeated empty lines Include strict checks Auto-run while typing

How to use this developer tool

Paste source code into the input area.
Select the processing mode and adjust the numeric option.
Run the tool or keep auto-run enabled.
Review status, summary, interpretation, and the copy-ready output.
Copy the result or download it with the appropriate extension.

What this developer tool does

Input → protected lexical scan → tool-specific parsing or transformation → metrics → status and recommendations

Results are browser-side heuristics. They do not replace Roslyn, Clang, a compiler, unit tests, or project-specific static analysis.

Example

Input: Paste the included sample and run the tool.
Output: The page produces a real C++ Checker result, statistics, status, and practical interpretation.

Tips for better output

Use complete, consistently encoded source whenever possible.
Run compiler and project tests after automated formatting or conversion.
Macro-heavy, generated, or incomplete code may produce partial structural analysis.
Keep auto-run disabled when editing extremely large source files.

FAQ

How do I check C++ code online before compiling?

Paste source into the input area, select the available options, and run C++ Checker. The result is processed locally in your browser.

How do I detect dangerous C++ functions?

The tool reports browser-detectable structure and style signals with line-oriented output where applicable.

How do I find mismatched new and free calls?

The analysis is heuristic and intentionally avoids claiming compiler-level certainty.

Why does C++ code still need compiler verification?

Large or macro-heavy files may produce partial results; use a compiler or language-specific analyzer for final verification.

How do I check duplicate include directives?

Run the formatter or validator first, then review the generated recommendations and copy or download the output.

Related developer tools

TypeScript Checker TypeScript Generator TypeScript Formatter TypeScript Converter

Supported analysis scope

Capability	Browser-side behavior
Privacy	Source is processed locally
Large input	Designed for 10,000+ lines
Verification	Compiler confirmation recommended

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