ifstream :: read在ASCII 26处失败

Question

This problem has been bugging me for a long time. For example, the code

ifstream in;
char temp;
int a;

in.open ("Random.txt");

for (a = 0;a < 10000;a++)
    in.read (&temp, 1);

in.close ();

works fine until the ifstream encounters a substitute character (ASCII = 26). Then, for all following characters, ifstream::read gives me temp = -1 . I don't really want this to happen, but instead want it to keep on reading characters from the file instead of -1 . What have I done wrong?

Answer 1

You need to open the stream in binary mode. For historic reasons the text mode on Windows will consider Control-Z (ASCII 26) as the end of a file.

There are more details in this earlier answer of mine .