Compilare: user.cpp: In function ‘void read_crap(int)’: user.cpp:40:9: warning: variable ‘trash’ set but not used [-Wunused-but-set-variable] int trash, n; ^ user.cpp: In function ‘int getInt()’: user.cpp:15:35: 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, f); ^ user.cpp:23:35: 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, f); ^ user.cpp: In function ‘void do_test(int)’: user.cpp:73:9: warning: ‘el’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (x == el) { ^