Elements of a C++ Functional Style Guide

Key elements of the C function style guide include: Function signatures: Use descriptive function names, easy-to-understand parameter types, and const references to pass non-modifying values. Function body: Break it into smaller pieces, use indentation and braces to enhance readability, and put variables in scope. Error handling: Use a try-catch block to specify a specific exception type and throw the exception. Memory management: Use smart pointers to avoid manual memory management. Documentation: Include purpose, parameter descriptions, and return values, and use documentation generation tools to automate the documentation process.

Elements of a C Functional Style Guide

Introduction
Normal functional style is essential for maintainability Safety and readability are crucial. This article outlines the key elements of the C functional style guide and provides practical examples to illustrate best practices.

Function signature

• Use descriptive and concise function names.
• Parameter types should be easy to understand and have clear names.
• Use const references to pass non-modifiable values.
• For longer parameter lists, use named parameters or structure parameters.

Practical case:

int calculate_total_cost(const Product& product, int quantity);

Function body

• Decompose the function body into manageable Small pieces.
• Use indentation and whitespace characters to enhance readability.
• Avoid declaring variables within the function body, instead place them within the scope.
• When using if-else statements, use indentation and braces.

Practical case:

if (is_valid) {
    // 执行有效代码
} else {
    // 执行无效代码
}

Error handling

• Use try-catch block to handle exceptions .
• Specify specific exception types in the catch block.
• Throw an exception when an error occurs instead of returning an error code.

Practical case:

try {
    // 执行可能抛出异常的操作
} catch (std::runtime_error& ex) {
    std::cerr << ex.what() << std::endl;
}

Memory management

• Use smart pointers (such as std:: unique_ptr, std::shared_ptr) to avoid manual memory management.
• Explicitly release dynamically allocated memory in the function body.

Practical case:

void release_resource() {
    if (resource != nullptr) {
        delete resource;
        resource = nullptr;
    }
}

Documentation

• Add comments to the function, including purpose and parameters Description and return value.
• Automate the documentation process using Doxygen or other documentation generation tools.

Practical case:

// 函数：计算产品总成本
///
/// \param product 要计算成本的产品
/// \param quantity 要购买的产品数量
/// \return 产品的总成本
int calculate_total_cost(const Product& product, int quantity);

Conclusion
Following the elements of these functional style guides can improve the maintainability of C code and readability are crucial. By applying these best practices, you can create high-quality functions that are easy to understand and maintain.

The above is the detailed content of Elements of a C++ Functional Style Guide. For more information, please follow other related articles on the PHP Chinese website!