> class basic_ofstream : public std::basic_ostream<CharT, Traits> 类模板 basic_ofstream 实现文件上基于流的高层输出操作。它将 std::basic_ostream 的高层接口赋予基于文件的流缓冲(std::basic_filebuf)。 std::basic_ofstream 的典型实现只保有一个非派生成员:一个 std::basic_filebuf<CharT, Traits>...
>classbasic_ofstream:publicstd::basic_ostream<CharT, Traits> 类模板basic_ofstream实现文件上基于流的高层输出操作。它将std::basic_ostream的高层接口赋予基于文件的流缓冲(std::basic_filebuf)。 std::basic_ofstream的典型实现只保有一个非派生成员:一个std::basic_filebuf<CharT, Traits>的实例。
From cppreference.com <cpp |io |basic ofstream voidopen(constchar*filename, std::ios_base::openmodemode =std::ios_base::out); (1) voidopen(conststd::filesystem::path::value_type*filename, std::ios_base::openmodemode
basic_ofstream( const basic_ofstream& rhs) = delete; (7) (since C++11) 构造新的文件流。 1%29默认构造函数:构造与文件无关的流:默认构造std::basic_filebuf并使用指向此默认构造的指针构造基。std::basic_filebuf会员。 2-3%29首先执行与默认构造函数相同的步骤,然后通过调用将流与文件关联。rdbuf()->...
basic_ofstream::rdbuf basic_ofstream::native_handle (C++26) File operations basic_ofstream::is_open basic_ofstream::open basic_ofstream::close Non-member functions swap(std::basic_ofstream) (C++11) void close(); Closes the associated file. Effectively calls rdbuf()->close(). If an error...
我有这样的cpp代码: std::ofstream fs; fs.open("a.txt", ios::out | ios::binary | ios::app); if(fs) { if(!fs.write(buffer, buffer_size)) { std::cout << strerror(errno) << std::endl; } } 但是我在linux系统中遇到了“没有这样的文件或目录”的错误。 我想知道什么原因会导致此...
voidswap(basic_ofstream<T>&lhs, basic_ofstream<T>&rhs); Spezialisiert diestd::swapAlgorithmus fürstd::basic_ofstream. Exchanges den Zustand derlhsmit derrhs. Effektiv nenntlhs.swap(rhs). Original: Specializes thestd::swapalgorithm forstd::basic_ofstream. Exchanges the state oflhswith that ...
"// or "\x7a\xc3\x9f\xe6\xb0\xb4\xf0\x9f\x8d\x8c";std::ofstream("text.txt")<<data;// using system-supplied locale's codecvt facetstd::wifstreamfin("text.txt");// reading from wifstream will use codecvt<wchar_t, char, mbstate_t>// this locale's codecvt converts UTF-8 ...
string()); std::ofstream(_path).put('a'); // create file of size 1 std::ofstream(_path).close(); // 文件类型判定 assert(fs::file_type::regular == fs::status(_path).type()); // <11> 获取文件大小 auto size = fs::file_size(_path); fmt::print("file_size = {}\n", ...
) {} ~deletable_facet() {} }; int main() { // UTF-8 narrow multibyte encoding std::string data = u8"z\u00df\u6c34\U0001f34c"; // or u8"zß水🍌" // or "\x7a\xc3\x9f\xe6\xb0\xb4\xf0\x9f\x8d\x8c"; std::ofstream("text.txt") << data; // using system-...