How To Use C++ Formatter & Validator
📝 Step 1: Enter C++ Code
Paste your C++ source code in the input area. Supports multiple functions and classes.
⚙️ Step 2: Choose C++ Standard
Select your target C++ version (C++11 to C++20) for appropriate formatting rules.
🔧 Step 3: Format or Validate
Click "Format Code" to beautify with proper indentation. Click "Validate Code" to check for syntax errors.
📋 Step 4: Copy or Download
Use the "Copy" button to copy formatted code to clipboard, or "Download" to save as .cpp file.
💡 Pro Tips
- Use the Sample button to load an example class
- Validation checks for: missing semicolons, unmatched braces/parentheses
- Formatting preserves comments and preprocessor directives
- Works with complex templates and STL code
🔍 Example
// Before formatting:
class MyClass{public:MyClass(){value=0;}void setValue(int v){value=v;}private:int value;};
// After formatting:
class MyClass {
public:
MyClass() {
value = 0;
}
void setValue(int v) {
value = v;
}
private:
int value;
};
Frequently Asked Questions
What C++ standards are supported? ▼
We support C++11, C++14, C++17, and C++20. Each standard has specific formatting conventions for features like auto, lambdas, and structured bindings.
Does it validate all C++ syntax? ▼
The validator checks for common syntax errors including: missing semicolons, unmatched braces/parentheses, and basic structure. It's designed for standard C++ but may not catch template metaprogramming errors.
What formatting options are available? ▼
The formatter adds proper indentation, line breaks after braces, aligns class members, and standardizes spacing. It follows common C++ style guides like Google's or LLVM's.
Can I format multiple classes/functions? ▼
Yes! The tool handles entire files with multiple classes, functions, and namespaces. Each construct is formatted independently while maintaining overall file structure.
Is my C++ code secure? ▼
Absolutely. Formatting happens entirely in your browser. Validation is done both client-side and server-side, but your actual code is never stored or logged.
What are common C++ errors it detects? ▼
Common errors include: missing semicolons, unmatched braces/parentheses, missing main() function, and incorrect namespace syntax.
Does it work with templates? ▼
Yes, basic template syntax is supported. The formatter will properly indent template declarations and specializations.
How accurate is the validation? ▼
The validator catches most syntax errors but won't catch semantic errors like type mismatches or undefined identifiers. It's great for quick syntax checking and formatting.