在Scott Meyers的"Effective STL"一书中,有一个将整个文本文件读入std :: string对象的好例子:
std::string sData;
/*** Open the file for reading, binary mode ***/
std::ifstream ifFile (“MyFile.txt”, std::ios_base::binary); // Open for input, binary mode
/*** Read in all the data from the file into one string object ***/
sData.assign (std::istreambuf_iterator <char> (ifFile),
std::istreambuf_iterator <char> ());
请注意,它以8字节字符的形式读取.这非常有效.最近虽然我需要读取包含Unicode文本的文件(即每个字符两个字节).但是,当我尝试(天真地)更改它以将数据从Unicode文本文件读取到std :: wstring对象时,如下所示:
std::wstring wsData;
/*** Open the file for reading, binary mode ***/
std::wifstream ifFile (“MyFile.txt”, std::ios_base::binary); // Open for input, binary mode
/*** Read in all the data from the file …