Compilare: user.cpp: In function ‘int get()’: user.cpp:25:44: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] while(buff[ps]<'0' || buff[ps]>'9') nxt; ^ user.cpp:28:12: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] nxt; ^ user.cpp: In function ‘int main()’: user.cpp:111:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("retea.in","r",stdin); ^ user.cpp:112:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("retea.out","w",stdout); ^ user.cpp: In function ‘void extract()’: user.cpp:78:17: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] heap_dw(p,1); nr--; ^