Compilare: main.cpp: In function 'char read_ch()': main.cpp:20:32: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(_in_buff, 1, 4096, fin); ^ main.cpp: In function 'int main()': main.cpp:46:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &t, &c ); ^