Compilare: user.cpp: In function ‘void read(int*)’: user.cpp:21:61: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (++pos >= DIM) fread(buf, 1, DIM, stdin), pos = 0; ^ user.cpp:26:61: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (++pos == DIM) fread(buf, 1, DIM, stdin), pos = 0; ^ user.cpp: In function ‘int main()’: user.cpp:76:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("scmax.out", "w", stdout); ^