Compilare: main.cpp: In function 'char next()': main.cpp:18:35: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, bsize, fin); ^ main.cpp: In function 'int main()': main.cpp:45:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, " %s", x); ^