>classbasic_fstream:publicstd::basic_iostream<CharT, Traits> 类模板basic_fstream实现基于文件的流上的高层输入/输出。它将std::basic_iostream的高层接口赋予基于文件的缓冲(std::basic_filebuf)。 std::basic_fstream的典型实现只保有一个非派生数据成员:std::basic_filebuf<CharT, Traits>的一个实例。
#include <fstream> #include <iostream> #include <string> int main() { std::fstream f1("example1", std::ios::out), f2("example2", std::ios::out), f3("example3", std::ios::out); std::cout << std::boolalpha << f1.is_open() << '\n' << f2.is_open() << '\n' <...
std::basic_fstream<CharT,Traits>::native_handle From cppreference.com <cpp |io |basic fstream Array I/O Synchronized Output Types Error category interface std::basic_fstream Member functions basic_fstream::basic_fstream basic_fstream::operator= ...
在标头<fstream>定义 template< classCharT, classTraits=std::char_traits<CharT> >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)。
C++文件fstream的操作 2019-11-13 17:16 −用到的关于输入输出fstream流相关的知识 1.两个主要函数:read( )函数 从流中读取字符串的成员函数read 该成员函数一般形式是:read(char* pch, int nCount) 从输入流中读取nCount个字符。当输入流中的字符数小... ...
// Sample 2#include<fmt/core.h>#include<filesystem>#include<fstream>#include<string>#include<cassert>namespacefs = std::filesystem;intmain(){// 1> 判断文件夹是否存在std::string dirName{"log"};fs::pathurl(dirName);if(!fs::exists(url)) ...
voidswap(basic_fstream<T>&lhs, basic_fstream<T>&rhs); Spezialisiert diestd::swapAlgorithmus fürstd::basic_fstream. Exchanges den Zustand derlhsmit derrhs. Effektiv nenntlhs.swap(rhs). Original: Specializes thestd::swapalgorithm forstd::basic_fstream. Exchanges the state oflhswith that ofrh...
C++ D'entrée / sortie de bibliothèque std::basic_ofstream Déclaré dans l'en-tête <fstream> template< class CharT, class Traits = std::char_traits<CharT> > class basic_ofstream : public std::basic_ostream<CharT, Traits> Le modèle basic_ofstream classe implémente les opérations ...
C++ D'entrée / sortie de bibliothèque std::basic_ifstream Déclaré dans l'en-tête <fstream> template< class CharT, class Traits = std::char_traits<CharT> > class basic_ifstream : public basic_istream<CharT, Traits> Le modèle basic_ifstream classe implémente les opérations d'ent...
#include <cstdint>#include <fstream>#include <iostream>#include <sstream>#include <string>intmain(){// read() is often used for binary I/Ostd::stringbin={'\x12','\x12','\x12','\x12'};std::istringstreamraw(bin);std::uint32_tn;if(raw.read(reinterpret_cast<char*>(&n), sizeof ...