Question

I have a problem with writing number to a file with ofstream. When i write numbers there are characters like this █ instead of numbers. The method i write to the file is:

byte _b = 20;
ofstream p_file;
p_file.open("txt.txt", std::ios::app);
p_file << _b;    

Is there any way to be right, or just use another filewriter method? Thanks.

EDIT:

p_file << (int) _b;

works fine. Thanks

Answer 1

I bet that byte is char or some variant thereof. In that case you are setting _b to the character with code 20, which in ASCII is a control character. The stream output will try to output the character not the number.

You can cast it to another integral type if you want to obtain the number:

p_file << static_cast<int>(_b);