类模板basic_ifstream实现文件流上的高层输入操作。它将std::basic_istream的高层接口赋予基于文件的流缓冲(std::basic_filebuf)。 std::basic_ifstream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。 继承图 提供了几个针对常用字符类型的 typedef: ...
#include <fstream>#include <iterator>#include <string>intmain(){std::ifstreamfile("data.txt");// 下面是函数声明:std::stringfoo1(std::istreambuf_iterator<char>(file),std::istreambuf_iterator<char>());// 它声明名为 str 的函数,其返回类型为 std::string,// 第一参数拥有 std::istream...
basic_ifstream::rdbuf basic_ifstream::native_handle (C++26) File operations basic_ifstream::is_open basic_ifstream::open basic_ifstream::close Non-member functions swap(std::basic_ifstream) (C++11) native_handle_type native_handle() const noexcept; (since C++26) Returns the implementation ...
std::ofstream("from.txt").put('a'))// create and write to file{std::perror("Error creating from.txt");returnEXIT_FAILURE;}if(std::rename("from.txt","to.txt")){std::perror("Error renaming");returnEXIT_FAILURE;}std::cout<<std::ifstream("to.txt").rdbuf()<<'\n';// print ...
#include <iostream> #include <fstream> #include <cstdlib> int main() { std::ifstream file("test.txt"); if(!file) // operator! is used here { std::cout << "File opening failed\n"; return EXIT_FAILURE; } // typical C++ I/O loop uses the return value of the I/O function //...
ifstream and ofstream #include <fstream> // open an ifstream ifstream inputFile; inputFile.open("InputFile.txt"); // Alternatively: // ifstream inputFile("InputFile.txt"); // open an ofstream ofstream outputFile; outputFile.open("OutputFile.txt"); // Alternatively: // ofstream outputFile...
YAML::Node node; YAML::Node _baseNode = YAML::LoadFile("dynamixel_servos_tilting.yaml"); mean while, I copiedyaml-cpp headers to /usr/local/include. I compiled with g++ --std=c++11 main.cpp -I. -I./libraries/yaml-cpp/include -L./libraries/yaml-cpp -lyaml-cpp -o main ...
<fstream> std::basic_fstream, std::basic_ifstream, std::basic_ofstream class templates and several typedefs <sstream> std::basic_stringstream, std::basic_istringstream, std::basic_ostringstream class templates and several typedefs <strstream> std::strstream, std::istrstream, std::ostrstream(de...
Une implémentation typique de std::basic_ifstream ne contient qu'un seul non-membre de données dérivées: une instance de std::basic_filebuf<CharT, Traits> . Original: A typical implementation of std::basic_ifstream holds only one non-derived data member: an instance of std::basic_file...
Eine typische Implementierung std::basic_ifstream hält nur ein nicht-abgeleiteten Daten Mitglied: eine Instanz std::basic_filebuf<CharT, Traits> . Original: A typical implementation of std::basic_ifstream holds only one non-derived data member: an instance of std::basic_filebuf<CharT, Tr...