Compilare: user.cpp: In function ‘int miau(int)’: user.cpp:15:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (val > 0x0000FFFFu) { val >>= 16; k = 16; } ^ user.cpp:16:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (val > 0x000000FFu) { val >>= 8; k |= 8; } ^ user.cpp:17:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (val > 0x0000000Fu) { val >>= 4; k |= 4; } ^ user.cpp:18:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (val > 0x00000003u) { val >>= 2; k |= 2; } ^ user.cpp: In function ‘int main()’: user.cpp:44:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i+k-1<s.size();i+=k) ^ user.cpp:84:27: warning: ‘ansj’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<ansi<<" "<<ansj; ^ user.cpp:84:12: warning: ‘ansi’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<ansi<<" "<<ansj; ^