Compilare: user.cpp: In function ‘int main(int, char**)’: user.cpp:36:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(FIN, "r", stdin); ^ user.cpp:37:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(FOUT, "w", stdout); ^ user.cpp: In function ‘int get()’: user.cpp:24:62: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (++g_p == CHUNK) fread(g_buf,1,CHUNK,stdin), g_p=0; ^ user.cpp:29:62: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (++g_p == CHUNK) fread(g_buf,1,CHUNK,stdin), g_p=0; ^