编辑“︁C++ try 块”︁（章节）

=== 文件处理 ===
<syntaxhighlight lang="cpp">
#include <fstream>
#include <iostream>

void safeFileOperation() {
    std::ifstream file;
    try {
        file.open("important_data.txt");
        if (!file) throw std::runtime_error("无法打开文件");
        
        // 处理文件内容
        std::string line;
        while (std::getline(file, line)) {
            if (line.empty()) throw std::runtime_error("发现空行");
            std::cout << line << std::endl;
        }
    }
    catch (const std::exception& e) {
        std::cerr << "文件操作错误: " << e.what() << std::endl;
        if (file.is_open()) file.close();
    }
}
</syntaxhighlight>