Compilare: user.cpp: In function ‘int main()’: user.cpp:66:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<n;i++){ ^ user.cpp: In function ‘int caut_bin(unit*, unsigned int, unsigned int)’: user.cpp:42:14: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] unsigned k,li=1,ls=n_v+1; ^ user.cpp: In function ‘int main()’: user.cpp:90:19: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(pos3[i].val+pos3[j].val != nr) cout<<-1; ^