#include <iostream>#include <fstream>intmain(){std::ifstreamf("doesn't exist");try{f.exceptions(f.failbit);}catch(conststd::ios_base::failure&e){std::cout<<"Caught an ios_base::failure.\n"<<"Explanatory string: "<<e.what()<<'\n'<<"Error code: "<<e.code()<<'\n';}} ...
failbit); } catch (const std::ios_base::failure& e) { std::cout << "捕获了 ios_base::failure。\n" << "解释字符串:" << e.what() << '\n' << "错误码:" << e.code() << '\n'; } } 可能的输出: 捕获了 ios_base::failure。解释字符串:ios_base::clear: 未指定的 ...
std::ios_base::event std::ios_base::fmtflags std::ios_base::iostate std::ios_base::iword std::ios_base::pword std::ios_base::register_callback std::ios_base::sync_with_stdio std::ios_base::Init std::ios_base::openmode std::ios_base::precision std::ios_base::width std::io...
std::ios_base 在标头<ios>定义 classios_base; 类ios_base是作为所有输入/输出流类的基类工作的多用途类。它维护几种数据: 1)状态信息:流状态标志; 2)控制信息:控制输入和输出序列格式化和浸染的本地环境的标志; 3)私有存储:允许long和void*成员的有下标可扩展数据结构,它可以实现为两个任意长度的数组,有两...
#include <fstream>#include <iostream>intmain(){std::ifstreamf("doesn't exist");try{f.exceptions(f.failbit);}catch(conststd::ios_base::failure&e){std::cout<<"Caught an ios_base::failure.\n"<<"Explanatory string: "<<e.what()<<'\n'<<"Error code: "<<e.code()<<'\n';}} ...
Does it make sense to setstd::ios_base::failbitto throw exceptions, for output streams? As in: 1 2 3 4 5 std::ofstream output_file("out.txt"); output_file.exceptions(std::ios_base::badbit | std::ios_base::failbit);// ... ...
In brief: std::ifstream is; is.exceptions( is.exceptions() | std::ios_base::failbit | std::ios_base::badbit ); // handle different exceptions as 'file not found', 'permission denied' try { is.open("my_valid_file.json"); const auto &jsonF...
cin.exceptions( std::ios::eofbit | std::ios::failbit ); int a = 0; while( cin >> a ) { cout << a << endl; } } catch( const std::ios_base::failure& e ) { cout << "ios_base::failure occurred: " << e.what() << endl; ...
#include <iostream>#include <sstream>intmain(){std::ostringstreamstream;if(!stream.fail())std::cout<<"stream is not fail\n";stream.setstate(std::ios_base::failbit);if(stream.fail())std::cout<<"now stream is fail\n";if(!stream.good())std::cout<<"and stream is not good\n";}...
1：iostate rdstate ( ) const; 返回的是iostate,简单的说也就是一个int数值.用2进制数据的某一个...