Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:22:9: error: ‘difx’ was not declared in this scope difx++; ^ user.cpp:30:4: error: ‘difx’ was not declared in this scope if(difx>dify) ^ user.cpp:48:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<h.size();i++) ^ user.cpp:52:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=i;j<h.size();j++) ^