My OS : Seven 4Bits
4bits?
Wow, it should be a very old OS
To be serious, it's an encoding problem (but I guess you know that). Do you have the same in command line compiling? I think yes, as the problem seems to be the compiler, not C::B itself. Compiler or sources.
I think the problem is that your source files are in an exotic encoding, and you will have to convert them.
I ran into the same problem one day.
The software I used to do the conversion was notepad++, but it was horribly long and boring... using an UI to do same manipulations on near 20 files... I hope to never have to do the same with big projects. (Or hope to find a batch tool to do this)