1)等价于status_known(s)&&s.type()!=file_type::not_found. 2)令s分别为如同以status(p)或status(p, ec)(跟随符号链接)确定的std::filesystem::file_status。返回exists(s)。若status_known(s)则不抛出重载调用ec.clear()。 参数 s-要检验的文件状态 p-要检验的
#include <iostream> #include <fstream> #include <cstdint> #include <experimental/filesystem> namespace fs = std::experimental::filesystem; void demo_exists(const fs::path& p, fs::file_status s = fs::file_status{}) { std::cout << p; if(fs::status_known(s) ? fs::exists(s) :...
选项2 (复制自: https ://www.scivision.co/cmake-cpp-17-filesystem/) make_minimum_required(VERSION 3.13) project(TheFsProject) set(CMAKE_CXX_STANDARD_REQUIRED ON) set(CMAKE_REQUIRED_FLAGS -std=c++17) include(CheckCXXSymbolExists) CHECK_CXX_SYMBOL_EXISTS(std::filesystem::path::preferred_sep...
4. 使用boost库中filesystem::exists函数 1 #include <boost/filesystem/operations.hpp> 2 #include <boost/filesystem/path.hpp> 3 #include <boost/filesystem/convenience.hpp> 4 5 using namespaceboost::filesystem; 6 7 int GetFilePath(std::string &strFilePath) 8{ 9 stringstrPath; 10 int nRes...
方法四:使用boost库中filesystem类库的exists函数 #include <boost/filesystem/operations.hpp>#include<boost/filesystem/path.hpp>#include<boost/filesystem/convenience.hpp>usingnamespaceboost::filesystem;intGetFilePath(std::string&strFilePath) {stringstrPath;intnRes =0;//指定路径strPath ="C:\";path ...
>>File ACCESS.C exists. >>File ACCESS.C has write permission 方法三:使用Windows API函数FindFirstFile(...) (1) 检查某一文件是否存在: #include "windows.h" int main(int argc, char *argv[]) { WIN32_FIND_DATA FindFileData; HANDLE hFind; ...
printf("File ACCESS.C exists");/*Check for write permission*/if( (_access("ACCESS.C",2)) != -1) printf("File ACCESS.C has write permission"); } } 输出:>>File ACCESS.C exists.>>File ACCESS.C has write permission 1. 2.
1 HANDLE FindFirstFile( LPCTSTR lpFileName,// pointer to name of file to search for 2 LPWIN32_FIND_DATA lpFindFileData // pointer to returned information 3 );如要判断⽂件夹是否存在，应增加 FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY 。1 WIN32_FIND_DATA _FIND_DATA;2 HANDLE ...
<stdlib.h> void main( void ){ /* Check for existence */ if( (_access( "ACCESS.C", 0 )) != -1 ){ printf( "File ACCESS.C exists " );/* Check for write permission */ if( (_access( "ACCESS.C", 2 )) != -1 )printf( "File ACCESS.C has write permission " );} } ...
The std::filesystem::create_directory 2-parameter version was changed to call the 1-parameter version, as the underlying CreateDirectoryExW function would use copy_symlink when the existing_p was a symlink. std::filesystem::directory_iterator no longer fails when a broken symlink is found. std...