Compilare: user.cpp: In function ‘int main()’: user.cpp:12:34: warning: operation on ‘nr’ may be undefined [-Wsequence-point] v[++nr] = v[nr-2]+v[nr-1]; ^ user.cpp:12:34: warning: operation on ‘nr’ may be undefined [-Wsequence-point] user.cpp:16:30: warning: operation on ‘b’ may be undefined [-Wsequence-point] if(a>b) a = a+b-(b=a); ^ user.cpp:26:29: warning: ‘firsti’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(rez==b and firsti%2==1) fout<<"2\n"; ^