Compilare: user.cpp: In function ‘int main()’: user.cpp:16:36: warning: operation on ‘nr’ may be undefined [-Wsequence-point] v[++nr]=2*v[nr-2]-v[nr-4]+3; ^ user.cpp:16:36: warning: operation on ‘nr’ may be undefined [-Wsequence-point] user.cpp:8:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^