Compilare: user.cpp: In function ‘void citeste(int&)’: user.cpp:40:39: 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, DIM, stdin); ^ user.cpp:50:39: 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, DIM, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:58:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("palmieri.in", "r", stdin); ^ user.cpp:59:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("palmieri.out", "w", stdout); ^ user.cpp:107:5: warning: ‘f’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(f) ct++; ^