Compilare: user.cpp: In function ‘int extrage()’: user.cpp:42:9: warning: unused variable ‘r’ [-Wunused-variable] int r; ^ user.cpp: In function ‘int getInt()’: user.cpp:18:37: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, maxb, 1, fin); ^ user.cpp:27:37: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, maxb, 1, fin); ^