wifstream | 易学教程

How can I read a text file containing Unicode, into a wchar_t pointer using wifstream?

阅读更多关于 How can I read a text file containing Unicode, into a wchar_t pointer using wifstream?

问题 I'm trying to read Unicode characters from a text file into a wchar_t pointer array, using wifstream . Here is a code snippet: locale::global(std::locale("en_US.UTF-8")); std::wifstream inputFile("gsmCharacterSet.txt", std::ifstream::binary | std::ifstream::ate); int length = inputFile.tellg(); inputFile.seekg(0,inputFile.beg); wchar_t *charArray = new wchar_t[length]; inputFile.read(charArray,length); It's not working. The length returned is 252 which is the correct file size in bytes.

Reading and writing files in Cyrillic in c++

阅读更多关于 Reading and writing files in Cyrillic in c++

问题 I have to first read a file in Cyrillic, then randomly pick random number of lines and write modified text to a different file. No problem with Latin letter, but I run into a problem with Cyrillic text, because I get some rubbish. So this is how I tried to do the thing. Say, file input.txt is ааааааа ббббббб ввввввв I have to read it, and put every line into a vector: vector<wstring> inputVector; wstring inputString, result; wifstream inputStream; inputStream.open("input.txt"); while(

Reading random access files [closed]

阅读更多关于 Reading random access files [closed]

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 6 years ago . I have developed a C++ application for reading and writing data on a random access file. (I use Visual C++ 2010) Here is my program: #include <iostream>

iostream, wifstream, and eclipse/g++ on windows

阅读更多关于 iostream, wifstream, and eclipse/g++ on windows

问题 I am using Eclipse on windows with the MinGW tool chain (g++, etc.). I have a program that I built on darwin that reads and writes to files using wifstream and wofstream. The program comiles and works find using eclipse on darwin (Mac)...no for my problem. When I move the code over to windows and try to build in using the MinGW tool chain and eclipse, I get a compile error on wifstream, wofstream, and wcout. Variables defined as wstring compile just fine. For example: wifstream inFile; inFile

wifstream with imbue, locale produces valgrind errors

阅读更多关于 wifstream with imbue, locale produces valgrind errors

问题 I implemented a language detector using ngrams and all works fine so far. In order to detect a bunch of languages I have a set of language dependent ngrams files for each supported language my detector needs to read in before the actual detection is started. For reading these files I set the systems default locale (which on my ubuntu machine is en_US.UTF-8) like so. These code snippets are in my language_identifier constructor: std::locale def_lc(""); // --- line 37 (see valgrind) const utf8

Reading and writing files in Cyrillic in c++

阅读更多关于 Reading and writing files in Cyrillic in c++

I have to first read a file in Cyrillic, then randomly pick random number of lines and write modified text to a different file. No problem with Latin letter, but I run into a problem with Cyrillic text, because I get some rubbish. So this is how I tried to do the thing. Say, file input.txt is ааааааа ббббббб ввввввв I have to read it, and put every line into a vector: vector<wstring> inputVector; wstring inputString, result; wifstream inputStream; inputStream.open("input.txt"); while(!inputStream.eof()) { getline(inputStream, inputString); inputVector.push_back(inputString); } inputStream

does (w)ifstream support different encodings

阅读更多关于 does (w)ifstream support different encodings

When I read a text file to a wide character string (std::wstring) using an wifstream, does the stream implementation support different encodings - i.e. can it be used to read e.g. ASCII, UTF-8, and UTF-16 files? If not, what would I have to do? (I need to read the entire file, if that makes a difference) quark C++ supports character encodings by means of std::locale and the facet std::codecvt . The general idea is that a locale object describes the aspects of the system that might vary from culture to culture, (human) language to language. These aspects are broken down into facet s, which are

does (w)ifstream support different encodings

阅读更多关于 does (w)ifstream support different encodings

问题 When I read a text file to a wide character string (std::wstring) using an wifstream, does the stream implementation support different encodings - i.e. can it be used to read e.g. ASCII, UTF-8, and UTF-16 files? If not, what would I have to do? (I need to read the entire file, if that makes a difference) 回答1: C++ supports character encodings by means of std::locale and the facet std::codecvt . The general idea is that a locale object describes the aspects of the system that might vary from