Compilare: user.cpp: In member function ‘void SkipList::insert(var)’: user.cpp:51:17: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] while(x & 3 == 3) sz++, x>>=2; ^ user.cpp: In function ‘void Read(var&)’: user.cpp:79:46: 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), poz=0; ^ user.cpp:84:46: 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), poz=0; ^ user.cpp: In function ‘int main()’: user.cpp:91:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in", "r", stdin); ^ user.cpp:92:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.out", "w", stdout); ^