c++ - Ifstream 在几行后停止读取文件

Question

我在 stringstream 中使用 ifstream 来读取文件，但它在几行后停止...

string read(string filename)
{
    ifstream inFile;
    inFile.open(filename);
    stringstream strStream;
    strStream << inFile.rdbuf();
    inFile.close();
    string str = strStream.str();
    return str;
}

这段代码在'zh¬'之后停止
我在想也许它们是 ascii 表中的控制字符，它停止后的第一个字符是 26。
但我认为这不重要。

Answer 1

您的 ifstream 正在以文本模式打开。尝试以二进制模式打开文件:std::ifstream inFile(文件名, std::ios::binary);

A text stream is an ordered sequence of characters composed into lines (zero or more characters plus a terminating '\n'). Whether the last line requires a terminating '\n' is implementation-defined. Characters may have to be added, altered, or deleted on input and output to conform to the conventions for representing text in the OS (in particular, C streams on Windows OS convert \n to \r\n on output, and convert \r\n to \n on input)

• Data read in from a text stream is guaranteed to compare equal to the data that were earlier written out to that stream only if all of the following is true:
  the data consist only of printing characters and the control characters \t and \n (in particular, on Windows OS, the character '\0x1A' terminates input)

• no \n is immediately preceded by a space character (space characters that are written out immediately before a \n may disappear when read)

• the last character is \n

A binary stream is an ordered sequence of characters that can transparently record internal data. Data read in from a binary stream always equals to the data that were earlier written out to that stream. Implementations are only allowed to append a number of null characters to the end of the stream. A wide binary stream doesn't need to end in the initial shift state.

https://en.cppreference.com/w/cpp/io/c#Binary_and_text_modes