Compilare: user.cpp: In function ‘int main()’: user.cpp:10:11: warning: variable ‘j’ set but not used [-Wunused-but-set-variable] int i,j,n,k; ^ user.cpp:11:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d ",&n); ^ user.cpp:14:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&v[i]); ^