Thread: Problems writing some chars to files with fprintf

I'm trying to write to files with fprintf, here are some examples:

Code:

FILE *fp;

fp = fopen("teste.txt", "w")

fprintf(fp, "# Author: %s\n", author);

however, if author, for instance, has some chars like á ò ê or even €, the text file will not be saved correctly. Why?

Easy to fix? How?