linux c++ 文件路径

#include <iostream>
#include <fstream>

int main() {
    // 使用绝对路径打开文件
    std::ifstream file1("/home/user/documents/example.txt");
    if (file1.is_open()) {
        std::cout << "File opened using absolute path." << std::endl;
        file1.close();
    } else {
        std::cout << "Unable to open file using absolute path." << std::endl;
    }

    // 使用相对路径打开文件
    std::ifstream file2("example.txt");
    if (file2.is_open()) {
        std::cout << "File opened using relative path." << std::endl;
        file2.close();
    } else {
        std::cout << "Unable to open file using relative path." << std::endl;
    }

    return 0;
}

chmod 755 /path/to/file
chown user:group /path/to/file